代谢时能直接生成一碳单位的化合物是（）-我要搜题网

[不定项选择题]共用题干第一篇

If your doctor could give you a drug that would let you live a healthy life for twice as long, would you take it?
The good news is that we may be drawing near to that date.Scientists have already extended the lives of flies,worms and mice in laboratories. Many now think that using genetic treatments we will soon be able to extend human life to at least 140 years.This seems a great idea. Think of how much more time we could spend chasing our dreams,spending time with our loved ones,watching our families grow and have families of their own.
"Longer life would give us a chance to recover from our mistakes and promote long term thinking,"says Dr Gregory Stock of the University of California School of Public Health."It would also raise productivity by adding to the year we can work."
Longer lives don't just affect the people who live them. They also affect society as a whole. "We have war,poverty,all sorts of issues around,and I don't think any of them would be at all helped by having people live longer,"says US bioethicist Daniel Callahan,"The question is what we will get as a society?I suspect it won't be a better society."
It would certainly be a very different society. People are already finding it more difficult to stay married. Divorce rates are rising. What would happen to marriage in a society where people lived for 140 years? And what would happen to family life if 9 or 10 generations of the same family were all alive at the same time?
Research into ageing may enable women to remain fertile for longer. And that raises the prospect of having 100-year-old parents,or brothers and sisters born 50 years apart. We think of an elder sibling as someone who can protect us and offer help and advice. That would be hard to do if that sibling came from a completely different generation.
Working life would also be affected,especially if the retirement age was lifted.More people would stay in work for longer. That would give us the benefits of age一skill,wisdom and good judgment.
On the other hand,more people working for longer would create greater competition for jobs. It would make it more difficult for younger people to find a job. Top posts would be dominated by the same few individuals,making career progress more difficult. And how easily would a 25-year-old employee be able to communicate with a 125-year-old boss?
Young people would be a smaller part of a society in which people lived to 140.It may be that such a society would place less importance on guiding and educating young people,and more on making life comfortable for the old.
And society would feel very different if more of its members were older. There would be more wisdom,but less energy.Young people like to move about. Old people like to sit still.Young people tend to act without thinking.Old people tend to think without acting.Young people are curious and like to experience different things.Old people are less enthusiastic about change.In fact,they are less enthusiastic about everything.
The effect of anti-ageing technology is deeper than we might think.But as the science advances,we need to think about these changes now."If this could ever happen,then we'd better ask what kind of society we want to get,"says Daniel Callahan."We had better not go anywhere near it until we have figure those problems out." An important feature of a society in which people live a long life is that________.
A.it places more emphasis on educating the young
B.it is both wise and energetic
C.it lacks the curiosity to experiment what is new
D.it welcomes changes

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[填空题]空中楼阁理论的提出者是（）。

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[单选题]使用中的氧气瓶和乙炔气瓶应垂直固定放置，氧气瓶和乙炔气瓶的距离不准小于（　　）m。
A.3
B.4
C.5
D.6

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[单项选择]设有关系R(S，D，M)，其函数依赖集F={S→D，D→M}。则关系R至多满足( )。
A. 1NF
B. 2NF
C. 3NF
D. BCNF

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[单选题]梯子应坚固完整，有防滑措施。梯子的支柱应能承受作业人员及所携带的工具、材料攀登时的总重量。
A.正确
B.错误
C.略
D.略
E.略
F.略

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[单项选择]男性，75岁，进行性排尿困难6个月，直肠指诊发现前列腺右侧有2cm×2cm硬结，1周后行PSA检查为120nN/ml，核素全身骨扫描示骨盆及腰椎系统反射性浓聚区，诊断为前列腺癌骨转移，对此患者现最适宜的治疗是（）
A. 根治性前列腺切除+反射治疗
B. 根治性前列腺切除+化学治疗
C. 根治性前列腺切除+盆腔淋巴结清扫
D. 前列腺切除+综合治疗
E. 双睾丸切除+抗雄激素药物+放射治疗

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[单选题]《国网江苏省电力有限公司生产现场领导干部和管理人员到岗到位规定》中规定：六级及以上电网运行风险预警管控，到岗到位人员有（）；地市公司级单位领导，管理人员；县公司级单位领导，管理人员；二级机构管理人员。
A.A-省检领导，管理人员
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C. 数据清单
D. 工作组

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[单项选择]代谢时能直接生成一碳单位的化合物是（）
A. 丙酮酸
B. 谷氨酸
C. α-酮戊二酸
D. 草酰乙酸
E. 甘氨酸

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[单项选择]代谢时能直接生成一碳单位的化合物是（） A. 丙酮酸B. 谷氨酸C. α-酮戊二酸D. 草酰乙酸E. 甘氨酸

热门试题:

[单项选择]代谢时能直接生成一碳单位的化合物是（）
A. 丙酮酸
B. 谷氨酸
C. α-酮戊二酸
D. 草酰乙酸
E. 甘氨酸