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A transplant operation is successful only if doctors can prevent the body from rejecting the ____organ.
A. borrowed
B. strange
C. novel
D. foreign
B. strange
C. novel
D. foreign
参考答案
参考解析
解析：与自身器官相对的是the foreign organ，正如与home 相对的是Foreign 一样。答案是D。
更多 “A transplant operation is successful only if doctors can prevent the body from rejecting the ____organ. A. borrowed B. strange C. novel D. foreign” 相关考题
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Based on the laser operation treatment of three patients。what can we infer from the passage?A．Laser light treatment is safe and effective．B．Laser light treatment is dangerous and ineffectiveC．Laser light treatment still requires much more studies．D．Government should encourage doctors to do research of laser light treatment on the human body．
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Spare a Kidney?It is no longer unusual for a spouse or relative to donate a kidney to a loved one,but the number of Americans who have given a kidney to a friend,a co-worker or even a complete stranger has risen sharply from 68 in 1994 to 176 in 1998.There are many reasons.First,it's possible to live a normal life with only one kidney.(The remaining kidney enlarges to make up most of the difference.)In addition a kidney from a live donor lasts longer than a kidney taken from someone who has died suddenly.But the biggest change in the past few years is that transplant surgeons have started using laparoscopic techniques to remove the donor kidney through a much smaller incision,and this can cut recovery time for the donor from six weeks to four weeks.Just because you do something,however,it doesn't mean you should.Donating a kidney means undergoing an operation that carries some risk.You could argue that you may be helping to save a life,but you certainly can't pretend that you're better off with one kidney instead of two.So,what are the risks?“As with any major operation,there is a chance of dying,of reoperation due to bleeding,of infection,of vein clots in the legs or a hernia at the incision,”says Dr.Arthur Matas,director of the renal-transplant program at the university of Minnesota Medical Center in Minneapolis.Even laparoscopy,a relatively new technique for kidneydonation,is not risk-free.Doctors estimate that chances of dying from the procedure are about 3 in 10,000.There's no money to be made;selling an organ is illegal.But the recipient's insurance normally covers your operation and immediate aftercare.Your costs can include hotel bills, lost pay during recovery or possible future disability.Although transplant centers must evaluate any potential donor's suitability,it never hurts to have an independent opinion.The most common contraindications are heart disease, diabetes and high blood pressure.Never let anyone,not even a close relative,pressure you into giving up an organno matter if you're healthy.“There's often the feeling that you're not a good friend,father, mother if you don't do this,” says Arthus Caplan, director of the University of Pennsylvania's center for Bioethics.Certain transplant centers will invent a“medical prob- lem”on behalf of those who are reluctant to donate but feel they can't say no.From 1994 to 1998 the number of Americans who had donated a kidney reached 244.A:RightB:WrongC:Not mentioned
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Spare a Kidney?It is no longer unusual for a spouse or relative to donate a kidney to a loved one,but the number of Americans who have given a kidney to a friend,a co-worker or even a complete stranger has risen sharply from 68 in 1994 to 176 in 1998.There are many reasons.First,it's possible to live a normal life with only one kidney.(The remaining kidney enlarges to make up most of the difference.)In addition a kidney from a live donor lasts longer than a kidney taken from someone who has died suddenly.But the biggest change in the past few years is that transplant surgeons have started using laparoscopic techniques to remove the donor kidney through a much smaller incision,and this can cut recovery time for the donor from six weeks to four weeks.Just because you do something,however,it doesn't mean you should.Donating a kidney means undergoing an operation that carries some risk.You could argue that you may be helping to save a life,but you certainly can't pretend that you're better off with one kidney instead of two.So,what are the risks?“As with any major operation,there is a chance of dying,of reoperation due to bleeding,of infection,of vein clots in the legs or a hernia at the incision,”says Dr.Arthur Matas,director of the renal-transplant program at the university of Minnesota Medical Center in Minneapolis.Even laparoscopy,a relatively new technique for kidneydonation,is not risk-free.Doctors estimate that chances of dying from the procedure are about 3 in 10,000.There's no money to be made;selling an organ is illegal.But the recipient's insurance normally covers your operation and immediate aftercare.Your costs can include hotel bills, lost pay during recovery or possible future disability.Although transplant centers must evaluate any potential donor's suitability,it never hurts to have an independent opinion.The most common contraindications are heart disease, diabetes and high blood pressure.Never let anyone,not even a close relative,pressure you into giving up an organno matter if you're healthy.“There's often the feeling that you're not a good friend,father, mother if you don't do this,” says Arthus Caplan, director of the University of Pennsylvania's center for Bioethics.Certain transplant centers will invent a“medical prob- lem”on behalf of those who are reluctant to donate but feel they can't say no.People with heart disease,diabetes and high pressure are not suitable for kidney dona- tion.A:RightB:WrongC:Not mentioned
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Tiny InvadersThe human body is truly amazing. It allows us to sense the world around us,to do work and have fun, and to move from place to place.In fact,the human body does its work so well that most people don't think about it very much-until they get sick.The germs（致病菌）that make people sick are everywhere. You can ' t see them , but they ' re there. They're sitting on your desk.They're hiding on your computer's keyboard.They're even in the air that you are breathing. There are two types of germs : viruses and bacteria（细菌）.Viruses are germs that can only live inside animals or plants. Viruses cause illnesses such as flu and measles（麻疹）.Bacteria are tiny creatures.Some bacteria are good.They can help your stomach break down food.Other bacteria aren't so good. They can make you sick. Bacteria can cause sore throats（喉痛）and ear infections.How can you stop these tiny invaders from making you sick?Your skin is the first defense against germs.You can prevent some illnesses simply by washing,with soap and water. But germs can still enter the body through small cuts in the skin or through the mouth,eyes,and nose.Once germs are inside your body , your immune（免疫的）system tries to protect you. It looks for and destroys germs.How does it do that?Special cells patrol your body.Some of these cells actually eat germs! Other cells make antibodies.An antibody sticks to a germ.There is a different antibody for each kind ofgerm.Some antibodies keep germs from making you sick.Others help your body find and kill germs.After agerm is destroyed,the antibodies stay in your body.They protect you if the same kind of germ comes back. That way you will not get the same illness twice.You can keep your body healthy by eating a nutritious（有营养的）diet to make your immune systerm strong. You can also help your immune system fight germs by getting vaccinated（接种）.Vaccines are medicines.They contain germs that have been killed or weakened.The dead germs can't make you sick. Instead,they cause your body to make antibodies.If the same germ ever shows up again,then yourantibodies attack it.Washing your skin can prevent some illnesses.A:RightB:WrongC:Not mentioned
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Spare a Kidney?It is no longer unusual for a spouse or relative to donate a kidney to a loved one,but the number of Americans who have given a kidney to a friend,a co-worker or even a complete stranger has risen sharply from 68 in 1994 to 176 in 1998.There are many reasons.First,it's possible to live a normal life with only one kidney.(The remaining kidney enlarges to make up most of the difference.)In addition a kidney from a live donor lasts longer than a kidney taken from someone who has died suddenly.But the biggest change in the past few years is that transplant surgeons have started using laparoscopic techniques to remove the donor kidney through a much smaller incision,and this can cut recovery time for the donor from six weeks to four weeks.Just because you do something,however,it doesn't mean you should.Donating a kidney means undergoing an operation that carries some risk.You could argue that you may be helping to save a life,but you certainly can't pretend that you're better off with one kidney instead of two.So,what are the risks?“As with any major operation,there is a chance of dying,of reoperation due to bleeding,of infection,of vein clots in the legs or a hernia at the incision,”says Dr.Arthur Matas,director of the renal-transplant program at the university of Minnesota Medical Center in Minneapolis.Even laparoscopy,a relatively new technique for kidneydonation,is not risk-free.Doctors estimate that chances of dying from the procedure are about 3 in 10,000.There's no money to be made;selling an organ is illegal.But the recipient's insurance normally covers your operation and immediate aftercare.Your costs can include hotel bills, lost pay during recovery or possible future disability.Although transplant centers must evaluate any potential donor's suitability,it never hurts to have an independent opinion.The most common contraindications are heart disease, diabetes and high blood pressure.Never let anyone,not even a close relative,pressure you into giving up an organno matter if you're healthy.“There's often the feeling that you're not a good friend,father, mother if you don't do this,” says Arthus Caplan, director of the University of Pennsylvania's center for Bioethics.Certain transplant centers will invent a“medical prob- lem”on behalf of those who are reluctant to donate but feel they can't say no.Certain transplant centers invent“medical problems” to cheat potential kidney donors.A:RightB:WrongC:Not mentioned
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Tiny InvadersThe human body is truly amazing. It allows us to sense the world around us,to do work and have fun, and to move from place to place.In fact,the human body does its work so well that most people don't think about it very much-until they get sick.The germs（致病菌）that make people sick are everywhere. You can ' t see them , but they ' re there. They're sitting on your desk.They're hiding on your computer's keyboard.They're even in the air that you are breathing. There are two types of germs : viruses and bacteria（细菌）.Viruses are germs that can only live inside animals or plants. Viruses cause illnesses such as flu and measles（麻疹）.Bacteria are tiny creatures.Some bacteria are good.They can help your stomach break down food.Other bacteria aren't so good. They can make you sick. Bacteria can cause sore throats（喉痛）and ear infections.How can you stop these tiny invaders from making you sick?Your skin is the first defense against germs.You can prevent some illnesses simply by washing,with soap and water. But germs can still enter the body through small cuts in the skin or through the mouth,eyes,and nose.Once germs are inside your body , your immune（免疫的）system tries to protect you. It looks for and destroys germs.How does it do that?Special cells patrol your body.Some of these cells actually eat germs! Other cells make antibodies.An antibody sticks to a germ.There is a different antibody for each kind ofgerm.Some antibodies keep germs from making you sick.Others help your body find and kill germs.After agerm is destroyed,the antibodies stay in your body.They protect you if the same kind of germ comes back. That way you will not get the same illness twice.You can keep your body healthy by eating a nutritious（有营养的）diet to make your immune systerm strong. You can also help your immune system fight germs by getting vaccinated（接种）.Vaccines are medicines.They contain germs that have been killed or weakened.The dead germs can't make you sick. Instead,they cause your body to make antibodies.If the same germ ever shows up again,then yourantibodies attack it.Viruses can only live inside people or animals.A:RightB:WrongC:Not mentioned
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Spare a Kidney?It is no longer unusual for a spouse or relative to donate a kidney to a loved one,but the number of Americans who have given a kidney to a friend,a co-worker or even a complete stranger has risen sharply from 68 in 1994 to 176 in 1998.There are many reasons.First,it's possible to live a normal life with only one kidney.(The remaining kidney enlarges to make up most of the difference.)In addition a kidney from a live donor lasts longer than a kidney taken from someone who has died suddenly.But the biggest change in the past few years is that transplant surgeons have started using laparoscopic techniques to remove the donor kidney through a much smaller incision,and this can cut recovery time for the donor from six weeks to four weeks.Just because you do something,however,it doesn't mean you should.Donating a kidney means undergoing an operation that carries some risk.You could argue that you may be helping to save a life,but you certainly can't pretend that you're better off with one kidney instead of two.So,what are the risks?“As with any major operation,there is a chance of dying,of reoperation due to bleeding,of infection,of vein clots in the legs or a hernia at the incision,”says Dr.Arthur Matas,director of the renal-transplant program at the university of Minnesota Medical Center in Minneapolis.Even laparoscopy,a relatively new technique for kidneydonation,is not risk-free.Doctors estimate that chances of dying from the procedure are about 3 in 10,000.There's no money to be made;selling an organ is illegal.But the recipient's insurance normally covers your operation and immediate aftercare.Your costs can include hotel bills, lost pay during recovery or possible future disability.Although transplant centers must evaluate any potential donor's suitability,it never hurts to have an independent opinion.The most common contraindications are heart disease, diabetes and high blood pressure.Never let anyone,not even a close relative,pressure you into giving up an organno matter if you're healthy.“There's often the feeling that you're not a good friend,father, mother if you don't do this,” says Arthus Caplan, director of the University of Pennsylvania's center for Bioethics.Certain transplant centers will invent a“medical prob- lem”on behalf of those who are reluctant to donate but feel they can't say no.None of the Americans who donates a kidney during the period lasting from 1994 to 1998 died from the procedure.A:RightB:WrongC:Not mentioned
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First Self-contained Heart ImplantedA patient on the brink of death has received the world's first self-contained artificial heart-a battery-powered device about the size of a softball that runs without the need for wires,tubes or hoses sticking out of the chest.Two surgeons from the University of Louisville implanted the titanium and plastic pump dur-ing a seven-hour operation at Jewish Hospital Monday.The hospital said the patient was"awake and responsive"Tuesday and resting comfortably.It refused to release personal details.The patient had been expected to die within a month without the operation,and doctors said they expected the artificial heart to extend the person's life by only a month.But the device is con-sidered a major step toward improving the patient's quality of life.The new pump,called AbioCor,is also a technological leap from the mechanical hearts used in the 1980s,which were attached by wires and tubes to bulky machinery outside the body.The most famous of those,the Jarvic-7,used air as a pumping device and was attached to an appara-tus about the size of a washing machine."I think it's potentially a major step forward in the artificial heart development,"said Dr. David Faxon,president of the American Heart Association.However,he said the dream of an im-plantable,permanent artificial heart is not yet a reality,"This is obviously an experimental device whose long-term success has to be demonstrated."Only about half of the 4,200 Americans on a waiting list for donor hearts received them last year,and most of the rest died.Some doctors,including Robert Higgins,chairman of cardiology at the Medical College of Virginia in Richmond,said artificial hearts are unlikely to replace donor hearts."A donor heart in a good transplant can last 15 to 30 years,"he said."It's going to be hard to replace that with a machine."The AbilCor has a 2-pound pumping unit,and electronic controls that adjust the pumping speed based on the body's needs. It is powered by a small battery pack worn outside the body that transmits current through the skin. Approximately two thousand one hundred patients received heart implantation in America last year.A: RightB: WrongC: Not mentioned
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First Self-contained Heart ImplantedA patient on the brink of death has received the world's first self-contained artificial heart-a battery-powered device about the size of a softball that runs without the need for wires,tubes or hoses sticking out of the chest.Two surgeons from the University of Louisville implanted the titanium and plastic pump dur-ing a seven-hour operation at Jewish Hospital Monday.The hospital said the patient was"awake and responsive"Tuesday and resting comfortably.It refused to release personal details.The patient had been expected to die within a month without the operation,and doctors said they expected the artificial heart to extend the person's life by only a month.But the device is con-sidered a major step toward improving the patient's quality of life.The new pump,called AbioCor,is also a technological leap from the mechanical hearts used in the 1980s,which were attached by wires and tubes to bulky machinery outside the body.The most famous of those,the Jarvic-7,used air as a pumping device and was attached to an appara-tus about the size of a washing machine."I think it's potentially a major step forward in the artificial heart development,"said Dr. David Faxon,president of the American Heart Association.However,he said the dream of an im-plantable,permanent artificial heart is not yet a reality,"This is obviously an experimental device whose long-term success has to be demonstrated."Only about half of the 4,200 Americans on a waiting list for donor hearts received them last year,and most of the rest died.Some doctors,including Robert Higgins,chairman of cardiology at the Medical College of Virginia in Richmond,said artificial hearts are unlikely to replace donor hearts."A donor heart in a good transplant can last 15 to 30 years,"he said."It's going to be hard to replace that with a machine."The AbilCor has a 2-pound pumping unit,and electronic controls that adjust the pumping speed based on the body's needs. It is powered by a small battery pack worn outside the body that transmits current through the skin. Some doctors doubt the possibility of donor hearts being replaced by artificial ones.A: RightB: WrongC: Not mentioned
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第三篇First Self-contained Heart ImplantedA patient on the brink（边缘）of death has received the world's first self-contained artificial heart-a battery-powered device about the size of a softball that runs without the need for wires,tubes sticking out of the chest.Two surgeons from the University of Louisville implanted the titanium（钛）and plastic pump during a seven-hour operation at Jewish Hospital Monday.The hospital said the patient was"awake and responsive" Tuesday and resting comfortably.It refused to release personal details.The patient had been expected to die within a month without the operation,and doctors said they expected the artificial heart to extend the person's life by only a month.But the device is considered a major step toward improving the patient's quality of life.The new pump,called AbioCor,is also a technological leap from the mechanical hearts used in the 1980s,which were attached by wires and tubes to bulky machinery outside the body.The most famous of those mechanical hearts,the Jarvic-7，used air as a pumping device and was attached to an apparatus about the size of a washing machine."I think it's potentially a major step forward in the artificial heart development,"said Dr.DavidFaxon,president of the American Heart Association.However,he said the dream of an implantable,perma- nent artificial heart is not yet a reality."This is obviously an experimental device whose long-term success has to be demonstrated."Only about half of the 4,200 Americans on a waiting list for donor hearts received them last year,and most of the rest died.Some doctors,including Robert Higgins,chairman of cardiology at the Medical Col-lege of Virginia in Richmond,said artificial hearts are unlikely to replace donor hearts."A donor heart in a good transplant can last 15 to 30 years."he said,"It's going to be hard to replace that with a machine."It can be inferred from the passage that donor hearts______.A:will be replaced by self-contained artificial hearts sooner or laterB:are more popular and cheaper than self-contained artificial heartsC:saved the lives of about 2,100 Americans the year before the reportD:can help patients survive less than 15 years if they are in good transplant
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第三篇First Self-contained Heart ImplantedA patient on the brink（边缘）of death has received the world's first self-contained artificial heart-a battery-powered device about the size of a softball that runs without the need for wires,tubes sticking out of the chest.Two surgeons from the University of Louisville implanted the titanium（钛）and plastic pump during a seven-hour operation at Jewish Hospital Monday.The hospital said the patient was"awake and responsive" Tuesday and resting comfortably.It refused to release personal details.The patient had been expected to die within a month without the operation,and doctors said they expected the artificial heart to extend the person's life by only a month.But the device is considered a major step toward improving the patient's quality of life.The new pump,called AbioCor,is also a technological leap from the mechanical hearts used in the 1980s,which were attached by wires and tubes to bulky machinery outside the body.The most famous of those mechanical hearts,the Jarvic-7，used air as a pumping device and was attached to an apparatus about the size of a washing machine."I think it's potentially a major step forward in the artificial heart development,"said Dr.DavidFaxon,president of the American Heart Association.However,he said the dream of an implantable,perma- nent artificial heart is not yet a reality."This is obviously an experimental device whose long-term success has to be demonstrated."Only about half of the 4,200 Americans on a waiting list for donor hearts received them last year,and most of the rest died.Some doctors,including Robert Higgins,chairman of cardiology at the Medical Col-lege of Virginia in Richmond,said artificial hearts are unlikely to replace donor hearts."A donor heart in a good transplant can last 15 to 30 years."he said,"It's going to be hard to replace that with a machine."We can learn from Paragraph 4 that the Jarvic-7 is_____.A:the most expensive mechanical heartB:a mechanical heart used in the 1980sC:as advanced as AbioCorD:replacing AbioCor
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第二篇Bone Marrow TransplantationBone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.Before receiving healthy cells,diseased cells must_________.A:undergo chemotherapyB:go through radiationC:be preparedD:be wrecked
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Acupuncture一Old Chinese MedicineFor more than 4,000 years people in Asia have used acupuncture to treat illnesses.________ (46)Today acupuncture is also very popular in Europe,America and Australia.Acupuncture can control pain and sickness.It can also be used if you have a headache or back pain.Some doctors use acupuncture along with regular treatments for asthma,high blood pressure or stress.________(47)Some people think that acupuncture can treat depression and even help people to stop smoking. Many patients feel more energy after a treatment,while others may feel more relaxed.People who practice acupuncture must take courses to learn how to do it correctly._________(48)During treatment the patient lies down and needles are stuck into certain points of the body. There are hundreds of possible points and each one has a certain effect on the body._________(49) For example you stick a needle into the hand to treat problems with your stomach.Acupuncture needles are made of metal and about as thick as a human hair. They normally go less than one cm into the skin.When they are in the skin the acupuncturist may twist them or send electricity through them.The patients rest for a short time and then the needles are removed.Acupuncture normally doesn't hurt. There is also a milder form of acupuncture called acupressure where you don't need needles.Doctors use their fingers to press the points of the body.Chinese medicine teaches us that all acupuncture points are located along pathways called meridians.Each of these meridians carries energy,which the Chinese call "qi" to certain points of the body.If this "qi" gets blocked from an area the person will get sick or feel pain.Sticking needles into the correct points can help "qi" flow again and make the person well.Doctors today are not sure how acupuncture really works.They have not found any proof that these pathways of energy really exist.Some think that needles cause the body to produce pain killing substances.________(50)Some also say that acupuncture only works because patients believe in it._________（50）A:In many places,especially outside of Asia,only doctors are allowed to perform acupuncture.B:The earliest written record of acupuncture is found in the Huangdi Neijing.C:Doctors have even used acupuncture to stop pain during an operation.D:The points can also be very far away from the place of pain.E:Others think that the needles block pain signals that travel along the nerves to the brain.F: It is an old Chinese form of healing in which your skin is pierced with thin needles to relieve pain.
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第二篇Bone Marrow TransplantationBone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.Healthy stem cells may come from the following sources EXCEPT__________.A:peripheral blood stem cellsB:baby bloodC:bone marrowD:cord blood
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第二篇Bone Marrow TransplantationBone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.We can infer from this passage that_________.A:bone marrow transplantation requires five proceduresB:bone marrow transplantation is complexC:people with leukemia must need transplantationD:people with cancer must donate bone marrow before treatment
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根据以下材料，回答题
The Chinese have used a method called acupuncture(针灸) toperform operations for about 4,000 years without putting the patient to sleep.This involves placing flexible needles (针) into certainparts of the body. The needles used are available in a number of stores inChina and everyone may buy them.
To learn how to use needle takes about onemonth of training. But to be skillful requires greater time. The person whoperforms the acupuncture knows how to put in the needles so the needles themselvesare not painful. This person also knows where to place the needles so thepatient feels no pain in the area where the operation is to be performed. Theneedles are not necessarily inserted near the place where the pain is to beprevented. In the past, a particular operation might require 25 or more needlesplaced in various parts of the body. But now this operation requires only 3 or4 needles.
Today the Chinese doctors are trying tolearn more about acupuncture. They are trying to develop a convincing theory toexplain how the needles work in preventing pain, or why a needle in the wrist,for example, would prevent the pain in the area of the mouth.
A patient who needs an operation is given achoice between having acupuncture or having one of the chemicals used forputting him to sleep. It has been estimated that over half of the patients chooseacupuncture because there is no sickness after the operation whereas (然而，反之) the chemical maymake the patient sick for a few hours or a day.
It can be learned from the passage that______查看材料A.the person performing the acupunctureknows a lot about the making of needles
B.an operation now needs fewer needles thanin the past
C.acupuncture has existed in China for as longas 2,000 years
D.few patients prefer acupuncture tochemicals
考题
Select the two correctstatements from the list below that describe DES and 3DES： （）A、 3DES is muchmore secure than DES.B、 Both DES and 3DES are stream ciphers.C、 DES uses 64 bitkeys， although the effective key lengthis only 56bits.D、 The decryption operation for both DES and 3DES is the same as the encryption operation.E、 DES can only be used for encryption， whereas 3DES can also be used for authentication.
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Which statement about vlan operation on cisco catalyst switches is true?（）A、when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.B、unkown unicast frames are retransmitted only to the ports that belong to the same vlanC、ports between switches should be configured in access mode so that vlans can span across the portsD、broadcast and multicast frames are retransmitted to ports that are configured on different vlan.
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Switch R1 and R2 both belong to the Company VTP domain. What’s true about the switch operation in VTP domains？（）A、A switch can only reside in one management domainB、A switch is listening to VTP advertisements from their own domain onlyC、A switch is listening to VTP advertisements from multi domainsD、A switch can reside in one or more domainsE、VTP is no longer supported on Catalyst switches
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Your database is running in the ARCHIVELOG mode. You placed a tablespace， tbs_1， offline with the immediate option. Which statement is correct in this scenario？ （）A、The operation would fail if tbs_1 were a read-only tablespace.B、The operation would fail if tbs_1 were a read/write tablespace.C、The operation would fail if tbs_1 were the default tablespace for the database.D、If the above operation were successful， media recovery would be required to bring the tablespace online.E、If the above operation were successful， instance recovery would be required to bring the tablespace online.
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You want to perform an RMAN backup of database as a copy. Which two factors will you consider while performing the backup operation?（）A、The backup as copy can only be taken to diskB、The backup as copy can only be taken to tapeC、Backup can be performed only when the instance is shutdownD、Backup will constitute all used and unused blocks in the database
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多选题You want to perform an RMAN backup of database as a copy. Which two factors will you consider while performing the backup operation?（）AThe backup as copy can only be taken to diskBThe backup as copy can only be taken to tapeCBackup can be performed only when the instance is shutdownDBackup will constitute all used and unused blocks in the database
考题
单选题Water in the fuel can prevent the engine from starting, prevent it from developing full power, or （）A
run at an irregular speedB
create high lube oil temperatureC
cause the engine to over-speedD
cause blue smoke in the exhaust
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单选题After abandoning a vessel，water that is consumed within the first 24 hours will（）.A
pass through the body with little absorbed by the systemB
help to prevent fatigueC
quench thirst for only 2 hoursD
help to prevent seasickness
考题
单选题What is the major advantage of high altitude observations?（）A
Errors due to unusual parallax are eliminatedB
The same body can be used for a fix from observations separated by several minutesC
The declination is the only information needed from the almanacD
The semidiameter correction of the sextant altitude is eliminated
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