试题与答案

下列溶液中各微粒的浓度关系或说法正确的是( ) A.0.1mol•L-1pH=4

题型:选择题

题目:

下列溶液中各微粒的浓度关系或说法正确的是(  )

A.0.1 mol•L-1 pH=4的NaHB溶液中:c(HB-)>c(H2B)>c(B2-

B.等物质的量浓度的下列溶液中,①NH4Al(SO42、②NH4Cl、③CH3COONH4、④NH3•H2O:c(NH4+)由大到小的顺序是:①>②>③>④

C.a mol•L-1HCN溶液与b mol•L-1NaOH溶液等体积混合后,所得溶液中c(Na+)>c(CN-),则a一定大于b

D.0.1 mol•L-1的醋酸的pH=a,0.01 mol•L-1的醋酸的pH=b,则a+1=b

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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题型:阅读理解

阅读理解。

   Very old people do raise moral problems for almost everyone who comes in contact with them.

Their values-this can't be repeated too often-are not 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 flat with decaying food covered by small worms, and  an old

person lying alone in bed, taking no notice of the worms. But is it interfering(干涉) with  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 are in danger of carrying

this concept of personal freedom to the point where serious risks are being taken with the health and

safety of the old.

   Indeed, the old can be easily hurt or harmed. The body is like a car, it needs more mechanical

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the principle that while there's life, there's hope.

   When you talk to the old people, however, you are forced to the conclusion that whether age is happy

 or unpleasant depends less on money or on health than it does on your ability to have fun.

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A. The values are different between the old and the young.

B. The moral problems raised by old people.

C. The personal freedom for the old.

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C. Very old people like to live with their children.

D. Social services have nothing to do with very old people

3. According to the author, which of the following is right?

A. The older a person, the more care he needs.

B. Too much emphasis has been put on old people's values.

C. The human body can't be compared to a car.

D. It is easy to provide spare parts for old people.

4. The underlined word "it" in the last paragraph refers to "_________".

A. their money or their health

B. the conclusion you come to

C. your talk to the old people

D. whether age is happy or unpleasant

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