汽车零件失效的类型模式分为（）、（）、（）及（）等五类。

一条肽链的分子式为C₂₂H₃₄O₁₃N₆，其水解后 * * 生了下 * * 种氨基酸：

据此判断，下列有关叙述错误的是[ ]

A．1个C₂₂H₃₄O₁₃N₆分子水解后可以产生3个谷氨酸

B．合成1个C₂₂H₃₄O₁₃N₆分子同时将产生5个水分子

C．1个C₂₂H₃₄O₁₃N₆分子中存在1个游离的氨基和3个游离的羟基

D．在细胞中合成1个C₂₂H₃₄O₁₃N₆分子至少需要3种tRNA

根据中文意思完成句子。

小题1:该吃晚饭了。

___________________________________ supper.

小题2:春天来了，咱们去植树吧。

Spring is coming.  __________________to plant trees.

小题3:河水过去很脏，但是现在很干净。

The river ______________ dirty. But it’s very clean now. 

小题4:父母和邻居都为他而自豪。

_________________________________________ him.

小题5:学生们作业太多，用在体育锻炼上的时间很少。

The students have ____________________ physical exercises.

已经检验检疫机构签发的检验检疫证书和《出境货物通关单》的一般货物，应在（）天装运出口，而鲜活类货物在规定的期限出口。

A．60

B．45

C．30

D．14

测量散光镜片时，必须镜片光学中心不位于顶焦度计的光轴上，否则所测的球镜度误差会较大。

Very old people do raise moral problems for almost everyone who comes into touch with them.Their values---this can not be repeated too often--aren’t necessarily our values.Physical comfort,cleanness and order are not necessarily the most important things.The social services from time to time find themselves faced with a room with rotten food covered by small worms,and an old person lying alone on bed,taking no notice of the worms.But is it interrupting personal freedom to insist that they go to live with some of their relatives so that they might be taken better care of? Some social workers,the ones who clear up the worms,think we’re in danger of carrying this idea of personal freedom to the point where serious risks(冒险)are being taken with the health and safety of the old.

Indeed,the old can be easily hurt or harmed.The old is like a car: it needs more mechanical repair as it gets older.You can carry this comparison right through to provision of spare parts.But never forget that such operations are painful experiences,however good the results are.And at what point should you stop to treat the old body?Is it morally right to try to push off death by continuing the development of medicine to excite the forgetful old mind and to make the old body active,knowing that it is designed to die?You cannot ask doctors or scientists to decide,because so long as they can see the technical chances,they will feel it necessary to give them a try,by the rule that while there’s life,there’s hope.

Talking to the old,however,you’re forced to the conclusion that whether age is happy or unpleasant depends less on money or health than it does on your ability to have fun.

小题1:After reading Paragraph 1，we learn that____.

A．very old people are able to keep their living places very clean

B．old people enjoy living alone so as to have more personal freedom

C．every old people enjoy living with their relatives

D．social services have nothing to do with very old people小题2:Some social workers think that_____．

A．old people should keep their living places clean

B．one should not take risk dealing with old people

C．health and safety are more important than personal freedom

D．personal freedom is more important than health and safety小题3:In Paragraph 3，the underlined word“it”refers to____．

A．one’s memory or health

B．the conclusion you have come to

C．whether age is happy or unpleasant

D．your talk to the old people小题4:The writer of this passage thinks that_______．

A．it is always morally right to treat old people and push off death

B．the opinion that we should try every means possible to save old people is uncertain

C．old people can enjoy a happy life only if they are very rich

D．medical decisions for old people should be left to the doctors