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Antiseptics are used principally to ______．
A.speed healing
B.prevent infection
C.reduce inflammation
D.increase blood circulation
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更多 “ Antiseptics are used principally to ______．A.speed healingB.prevent infectionC.reduce inflammationD.increase blood circulation ” 相关考题
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Fast tracking means to:A.Speed up a project through parallel tasks.B.Swap one task for another.C.Reduce the number of tasks if possible.D.B and C.E.None of the above.
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You have been badly injured in a car accident. It is necessary to give you a blood transfusion because you lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you. There are four basic types of blood: A, B, AB, and O. A simple test can indicate a person's blood type, which, like hair color and height, is inherited from parents. Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can give to any other group; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma (liquid) until their1、A good title for this passage is ________.A、Getting Blood and PlasmaB、Special Blood TypesC、Human Blood TypesD、The Blood Bank of a Hospital2、The word "hence" in line 10 means _________A、alwaysB、 oftenC、 thereforeD、 seldom3、In a blood transfusion, it is easiest to find the acceptable type of blood for a person with the blood type of ________A、AB、 BC、 ABD、 O4、The purpose of using salt and plasma before a blood transfusion is to allow time ______.A、to test the reactions to the transfusionB、for matching the blood to be transfused with the patient's bloodC、 for the blood to be delivered from the blood bankD、 to select a new type of blood for the patient5、Most Europeans have blood type _________A、AB、BC、OD、A or O
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Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily byA.heat conduction into the injected fuel oilB.heat conduction into the water jacket wallC.water circulation through passages in the holderD.fuel oil circulation through passages m the holder
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In reducing engine speed to an efficient propeller speed by the use of reduction gears, _______.A.speed and torque are both reducedB.speed is reduced and torque remains unchangedC.speed is reduced and torque is increasedD.speed is sometimes unchanged while torque is increased
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A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral "4" when the vessel ______.A.speed begins to dropB.stopsC.receives ice damageD.becomes icebound
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A Doppler log in the volume reverberation mode indicates the ______.A.speed being made goodB.speed through the waterC.the set of the currentD.the depth of the water
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Surgery Involving the Heart1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room. This machine has made it possible to perform many operations on the heart and other thoracic organs which could not otherwise be done.There are several types of machines in use,all of which serve as a temporary substitute for the patient's heart and lungs.2 The machine siphons off the blood from the large vessels entering the heart on the right side so that no blood passes through the heart and lungs.The blood is returned to the general circulation for body distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient byobstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to distribute the processed blood throughout the body by means of the artery mentioned above.3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In other cases there may be so much damage that replacement is the only resort. Substitute valves,made of plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of dacron（涤纶）or other synthetic material have also been successfully used.4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not proved as successful as the artificial valves.However,research continues and it is quite possible that an effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most serious problem related to heart transplants.The heart-lung machine is an essential helper for surgeons________.A:and finally they fail to function properlyB:to perform many surgical operations on the chestC:when it passes through the heart-lung machineD:and they no longer obstruct the blood flowE:to match tissues of the donor and the recipientF: when the ineffective valves are replaced by artificial ones
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第二篇 Diabetes（糖尿病）and Eye DamageOver 2 million Canadians have diabetes.It is the leading cause of blindness in North Americans under 65 years of age.Diabetes is a condition where the body either cannot produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood. The food people eat provides the body with glucose,which is used by the cells as a source of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood into the cells,glucose will stay in the blood,leading to high blood sugar levels.High blood sugar levels damage the blood vessels,including the tiny blood vessels in the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）. The retina（视网膜）is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as strong as the old ones.They are more likely to break,causing bleeding in the eye.At first,people with diabetic retinopathy will not notice any symptoms.As the disease gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic retinopathy,and the risk increases the longer you've had diabetes.Fortunately,you can reduce your risk.If you do not have diabetes,but think you may be at risk for this condition,visit your doctor to be screened for diabetes.If you do have diabetes:Have frequent eye check-ups.Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage.If you have high blood pressure,follow your recommended diet and medications to keep it under control.If you are not sure whether you have high blood pressure,or whether your blood pressure is under control,discuss this with your doctor.With diabetic retinopathy,the damaged blood vessels in the retinaA:are stronger than what they used to be.B: cannot be properly replaced.C:are more likely to break than the new ones.D: may return to normal again.
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共用题干
Surgery Involving the Heart1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room. This machine has made it possible to perform many operations on the heart and other thoracic organs which could not otherwise be done.There are several types of machines in use,all of which serve as a temporary substitute for the patient's heart and lungs.2 The machine siphons off the blood from the large vessels entering the heart on the right side so that no blood passes through the heart and lungs.The blood is returned to the general circulation for body distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient byobstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to distribute the processed blood throughout the body by means of the artery mentioned above.3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In other cases there may be so much damage that replacement is the only resort. Substitute valves,made of plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of dacron（涤纶）or other synthetic material have also been successfully used.4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not proved as successful as the artificial valves.However,research continues and it is quite possible that an effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most serious problem related to heart transplants.Paragraph 3________ A:The Heart TransplantationB:How the Heart-lung Machine WorksC:A Machine Making Many Kinds of Thoracic Operations PossibleD:A Temporary Substitute for the Diseased ValveE:Operations on Cardiac Valves and Substitutes for ValvesF: How Every Part of the Heart Performs Its Function
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第二篇 Diabetes（糖尿病）and Eye DamageOver 2 million Canadians have diabetes.It is the leading cause of blindness in North Americans under 65 years of age.Diabetes is a condition where the body either cannot produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood. The food people eat provides the body with glucose,which is used by the cells as a source of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood into the cells,glucose will stay in the blood,leading to high blood sugar levels.High blood sugar levels damage the blood vessels,including the tiny blood vessels in the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）. The retina（视网膜）is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as strong as the old ones.They are more likely to break,causing bleeding in the eye.At first,people with diabetic retinopathy will not notice any symptoms.As the disease gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic retinopathy,and the risk increases the longer you've had diabetes.Fortunately,you can reduce your risk.If you do not have diabetes,but think you may be at risk for this condition,visit your doctor to be screened for diabetes.If you do have diabetes:Have frequent eye check-ups.Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage.If you have high blood pressure,follow your recommended diet and medications to keep it under control.If you are not sure whether you have high blood pressure,or whether your blood pressure is under control,discuss this with your doctor.The word"its"in the second paragraph refers toA: the nerve's. B:the blood's.C:the eye's. D: the retina's,
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第二篇 Diabetes（糖尿病）and Eye DamageOver 2 million Canadians have diabetes.It is the leading cause of blindness in North Americans under 65 years of age.Diabetes is a condition where the body either cannot produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood. The food people eat provides the body with glucose,which is used by the cells as a source of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood into the cells,glucose will stay in the blood,leading to high blood sugar levels.High blood sugar levels damage the blood vessels,including the tiny blood vessels in the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）. The retina（视网膜）is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as strong as the old ones.They are more likely to break,causing bleeding in the eye.At first,people with diabetic retinopathy will not notice any symptoms.As the disease gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic retinopathy,and the risk increases the longer you've had diabetes.Fortunately,you can reduce your risk.If you do not have diabetes,but think you may be at risk for this condition,visit your doctor to be screened for diabetes.If you do have diabetes:Have frequent eye check-ups.Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage.If you have high blood pressure,follow your recommended diet and medications to keep it under control.If you are not sure whether you have high blood pressure,or whether your blood pressure is under control,discuss this with your doctor.The worst eye damage induced by diabetes isA:blurred vision. B: black spots,C: blindness. D: flashing lights.
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共用题干
Surgery Involving the Heart1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room. This machine has made it possible to perform many operations on the heart and other thoracic organs which could not otherwise be done.There are several types of machines in use,all of which serve as a temporary substitute for the patient's heart and lungs.2 The machine siphons off the blood from the large vessels entering the heart on the right side so that no blood passes through the heart and lungs.The blood is returned to the general circulation for body distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient byobstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to distribute the processed blood throughout the body by means of the artery mentioned above.3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In other cases there may be so much damage that replacement is the only resort. Substitute valves,made of plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of dacron（涤纶）or other synthetic material have also been successfully used.4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not proved as successful as the artificial valves.However,research continues and it is quite possible that an effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most serious problem related to heart transplants.The blood is oxygenated and carbon dioxide in it is removed________.A:and finally they fail to function properlyB:to perform many surgical operations on the chestC:when it passes through the heart-lung machineD:and they no longer obstruct the blood flowE:to match tissues of the donor and the recipientF: when the ineffective valves are replaced by artificial ones
考题
共用题干
第二篇 Diabetes（糖尿病）and Eye DamageOver 2 million Canadians have diabetes.It is the leading cause of blindness in North Americans under 65 years of age.Diabetes is a condition where the body either cannot produce enough insulin（胰岛素）or cannot respond properly to insulin. Insulin is important because it moves glucose（葡萄糖）,a simple sugar, into the body's cells from the blood. The food people eat provides the body with glucose,which is used by the cells as a source of energy.If insulin isn't available or doesn't work correctly to move glucose from the blood into the cells,glucose will stay in the blood,leading to high blood sugar levels.High blood sugar levels damage the blood vessels,including the tiny blood vessels in the eye．This leads to an eye disease known as diabetic retinopathy（糖尿病型视网膜病）. The retina（视网膜）is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other blood vessels begin to"leak"blood.This causes the retina to swell,and gradually cuts off its supply of oxygen and nutrients（滋养物）.Eventually , the retina starts to grow new blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as strong as the old ones.They are more likely to break,causing bleeding in the eye.At first,people with diabetic retinopathy will not notice any symptoms.As the disease gets worse , they may notice blurred（模糊的）vision, black spots or flashing lights. As time goes on,it can progress to blindness.Everyone with diabetes is at risk for diabetic retinopathy,and the risk increases the longer you've had diabetes.Fortunately,you can reduce your risk.If you do not have diabetes,but think you may be at risk for this condition,visit your doctor to be screened for diabetes.If you do have diabetes:Have frequent eye check-ups.Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage.If you have high blood pressure,follow your recommended diet and medications to keep it under control.If you are not sure whether you have high blood pressure,or whether your blood pressure is under control,discuss this with your doctor. To slow down eye damage,people with diabetes should try toA: use as many medications as they can.B: eat as little as possible.C: wear glasses as often as possible.D: keep their blood sugar under tight control.
考题
单选题What is the new discovery about? A
Converting A, B and AB blood types into type O blood.B
A safe way of transfusing blood.C
An important use of type O blood.
考题
问答题Drinking too much alcohol can lead to alcohol dependency, accidents, liver damage and so on. Connections have been made between heavy drinking and cancer of the mouth, strokes, raised blood pressure, increased infertility, A host of other unwelcome conditions have also been reported, which casts a shadow over even light social drinking. And in the United States women have been persuaded that any alcohol consumption during pregnancy “may lead to birth defects”, a message printed on every bottle of wine in commercial circulation.
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单选题In most pumps and pump motors overpacking the ball bearings full of grease will result in （）A
moisture emulsification of the bearing greaseB
insufficient circulation and overheating of the bearingC
proper grease circulation to cool the bearingD
sliding friction between balls and races
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填空题The political and economic unrest in the Middle East is principally attributed to oil.____
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单选题Stability is determined principally by the location of the center of gravity and the（）.A
aft perpendicularB
center of buoyancyC
keelD
center of flotation
考题
单选题Shaker, circulation and spray are the three general methods used in（）A
pre-injection fuel oil treatmentB
lube oil filtrationC
lube oil purificationD
piston cooling
考题
单选题Auxiliary boilers can be classified as（）A
water-tube natural circulation boilersB
fire-tube boilersC
water-tube forced circulation boilersD
all of the above
考题
单选题Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）A
A room thermostat activates an electric heater at each individual chilled air outlet when necessaryB
Varying the number of passes the air makes across the coilsC
Varying the temperature of the water through the coilsD
Varying the quantity of water flowing through the coils
考题
单选题Antiseptics are used principally to（）.A
speed healingB
prevent infectionC
reduce inflammationD
increase blood circulation
考题
单选题Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.A
heat conduction into the injected fuel oilB
heat conduction into the water jacket wallC
water circulation through passages in the holderD
fuel oil circulation through passages in the holder
考题
单选题Stability is determined principally by the location of two points in a vessel: the center of buoyancy and the（）.A
metacenterB
geometric center of the waterplane areaC
center of gravityD
center of flotation
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