网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
When he suddenly（） up the subject of genetic engineering, there was an embarrassed silence.
A
took
B
brought
C
showed
D
came
参考答案
参考解析
解析：
暂无解析
更多 “单选题When he suddenly（） up the subject of genetic engineering, there was an embarrassed silence.A tookB broughtC showedD came” 相关考题
考题
—The light in his room is still on. Do you know??____________?—In order to prepare for the coming exam.A. if he works hard B. why he stays up so lateC. why is he so busy D. when he will stop working
考题
You've read of how he had a headache and how, when he got word that Lee was ready to call it quits, he was suddenly and () cured.
A、motivationB、languidC、excessiveD、miraculously
考题
I believe that a student knows when he has handed ___________ something___________ his usual standard.
A. in⋯aboveB. up⋯aboveC. up ... aboutD. in⋯a
考题
My grandfather was a completely different person before he had a stroke. He worked as a chief accountant, and he worked really long hours. People used to say that he was a workaholic. When he came home, he was always tired and this used to make him irritable. He didn't use to be sociable at all. He used to spend a lot of time alone working in the garden. I used to be frightened of him as a child. He used to shout at us all the time. Then, suddenly he became ill, and then the doctors told him he had to give up work. He changed almost overnight. His attitude to lots of things changed. He relaxed and spent time with his grandchildren. When he died, I think he was a really happy, relaxed man.(1). My grandfather used to ().A、drink a lotB、work very hardC、be the manager(2). He was () when he came home.A、 very pleasantB、excitedC、easy to get angry(3). When I was a child, I ().A、 liked him very muchB、I hated himC、was afraid of him(4). Doctors asked him to ()after he had a stroke.A、 stop workingB、change his attitudeC、work less(5). When he died, he ().A、 was feeling worriedB、was irritableC、was a happy man
考题
Dick was a sailor on a big ship. It went to Japan and Australia, __21__ Dick was often on the ship for several months at a time. When he woke up in the morning and looked out, he only saw the sea, __22__ sometimes a port.When he was twenty-four, Dick __23__ and bought a small house with a garden in his wife's town. It was far away fromthe sea. Then he had to go back to his ship, and he __24__ home for two months. He went from the port to the town by bus, and was very happy to see his wife again.The next morning he slept until 9 o'clock. Then he woke up suddenly and looked out of the window. There were trees a few feet __25__. He was very frightened and jumped out ofbed, shouting, "We've hit land!"21.A.orB.did not comeC.soD.got marriedE.away22.A.orB.did not comeC.soD.got marriedE.away23.A.orB.did not comeC.soD.got marriedE.away24.A.orB.did not comeC.soD.got marriedE.away25.A.orB.did not comeC.soD.got marriedE.away
考题
When a child becomes a grown-up, he is supposed to＿．A．live comfortablyB．take responsibilitiesC．make progress in jobD．impress the society
考题
He has acquired a (comprehensive) knowledge of his subject through reading many new materials and up-to-date publications. 选择能代替括号里的选项A、extensiveB、comparativeC、subjectiveD、excessive
考题
The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can immediately be placed in the __ of operation when notified that the ship is in congested waters.A.manual modeB.automatic modeC.remote modeD.follow-up mode
考题
When a teacher says to the whole class,"Stand up and act out the dialogue", he/she isplaying the role of a(n) _________.
A.monitor
B.organizer
C.assessor
D.prompter
考题
共用题干
第一篇Genetic EngineeringGenetic engineering began when the DNA molecule（分子）,the most basic unit of life , was first described in 1953 by James Watson and Francis Crick.An understanding of DNA led to the altering of normal cell reproduction.Experiments with altering human cells began in 1970.In one of the first experiments,patients were injected with a virus that would produce a life-saving enzyme,but their bodies would not accept it.In 1980 patients with a rare but fatal blood disease were injected with a purified gene that was cloned through DNA technology.Another failure.Genetic engineering got a legal boost（激励）in 1980. The U. S. Supreme Court said that a patent couldbe granted on a genetically engineered "oil-eating" bacterium（细菌）.This bacterium would help clean up oil spills.The ruling encouraged companies to invent new life forms,and three important medical products were quickly developed.1.Human interferon（干扰素）—a possible solution to some cancers and viral diseases.A newly engineered bacterium produced human interferon as a by-product. This new product reduced the cost of interferon.2. Human growth hormone（荷尔蒙）一for children whose bodies do not grow to normal height. An expensive growth hormone was previously produced from human cadavers,but by changing the genetic make- up of the single-cell bacterium E.coli,and affordable growth hormone could be produced.3. Human insulin（胰岛素）一for the treatment of diabetes. People with diabetes used to rely on a beef- or-pork-based product until 1982.Now insulin can be manufactured by genetically altered bacteria.Advances in genetic engineering have continued,though they constantly must be weighed against the safety of procedures.There is clearly much more to discover.Genetic engineering may be defined as_________.A:the altering of normal cell reproductionB:a branch of applied chemistryC:a procedure that holds little promiseD:a study on life-saving enzymes
考题
The travelers were ready to enjoy the spectacular tidal waves when suddenly a thick fog came up and obscured the whole scene.A:blurred
B:belittled
C:banned
D:collapsed
考题
--Was it not until last week__________he decided to give up smoking?
--No, he began __________ he saw the new film last month.
A.when; as soon
B.that; immediately
C.did; that
D.that; till
考题
共用题干
第一篇Can Gene Technology Make Human Smarter?Almost everyone wants to get smarter. To achieve that,some choose to do exercise,others choose to take in more nutritions good for brains.Princeton neurobiologist Joseph Z.Tsien possibly found a different way to make it. In September he announced that he'd built a better mouse by altering a gene that affects learning and memory.A similar process of gene manipulation might conceivably be used one day to boost intelligence in humans.The key of this technology lies in a feature of brain cells called the NMDA receptor,which Tsien likens to a cylindrical tube or window that mediates the flow of information.When the window is open,chemicals called neurotransmitters flow through easily and memory is registered and stored. But as organisms mature,the window begins to close.(This may explain why children lose their facility for learning new languages when they reach sexual maturity and why some people suffer memory loss as they age.)Tsien also found out that the receptor worked more efficiently if it is teamed with the gene NR2B,so he introduced extra NR2B genes into a batch of fertilized mouse eggs.In a normal mouse,the memory window is open for just 150-thousandths of a second.In Tsien's specially engineered mice,the window opens for 250-thousandths of a second,long enough to make a remarkable difference in memory retention.When he pitted his mice against common mice,they won paws down.Ordinary mice could recognize a Lego block for 12 hours,but smart mice could remember the block for up to three days."That's a profound enhancement,"Tsien says.Can this technology be applied to humans?Maybe,but genetic engineering will have to make some extraordinary advances first. And some thorny ethical issues will have to be resolved. Mean-while,Tsien promises to keep his furry little geniuses locked up in a lab,far from your larder. "Otherwise,"he says,"you might need a smart cat or a smart mousetrap to catch them."What problems must be solves before this technology is applied to human?A:Gene must be conceivably manipulated.B:Genetic engineering will have to make some extraordinary advances first and some thorny ethical issues will have to be resolved.C:NMDA receptor is teamed with the gene NR2B.D:The smart nice must be locked up in a lab.
考题
When Rip Van Winkle woke up and went back to his village,he found he had slept in the hill for（）A10 yearsB20 yearsC50 yearsDNone of the above
考题
The man（）the gate when he realized that we had spotted him.A、made offB、made forC、made outD、made up
考题
When Rip Van Winkle woke up and went back to his village,he found he had slept in the hill for（）A、10 yearsB、20 yearsC、50 yearsD、None of the above
考题
单选题Which of the following is the best revision of the underlined portion of sentence 2 (reproduced below)?This is the experience that a thinker has when, after they thought about a problem long and hard, they suddenly come upon a solution in a flash when they are no longer thinking about it.A
that a thinker has when, after they thought long and hard about a problem, their solution suddenly arises like a flashB
that thinkers have when a solution suddenly had arisen like a flash after they were thinking long and hard about a problemC
that a thinker has when, after having thought long and hard about a problem, they suddenly come upon a solutionD
that thinkers have when, after having thought long hard hard about a problem, they suddenly come upon a solutionE
that thinkers have when, thinking long and hard about a problem, they suddenly come upon a solution in a flash
考题
单选题His parents died when he was young so he was _____ by his aunt.A
bredB
fed upC
brought upD
grown up
考题
单选题The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can immediately be placed in the （） of operation when notified that the ship is in congested waters.A
manual modeB
automatic modeC
remote modeD
follow-up mode
考题
单选题When a teacher says to the whole class, ”stand up and act out the dialogue”, he/she is playing the role of a(n) ----.A
monitorB
organizerC
assessorD
prompter
考题
单选题When Rip Van Winkle woke up and went back to his village,he found he had slept in the hill for（）A
10 yearsB
20 yearsC
50 yearsD
None of the above
考题
单选题The police ______ the murderer everywhere when he suddenly appeared in a theatre.A
is searching forB
are searching forC
were searching forD
was searching for
考题
单选题The boy was a _____ musician when he was in primary school but his genius seemed to have disappeared completely when he was grown up.A
promisingB
solidC
sincereD
retarded
热门标签
最新试卷