水资源

完形填空（共10小题；每小题2分，共20分）　   阅读下面短文，

掌握其大意，然后从21～30各题所给的四个选项（A、B、C和D）中，选出最佳选项。

Many people of my generation(代，一代) say that there is no hope for the future because of the way that   21       people behave today.

Their first argument（论点） is that when we were young we used to look after the  22     people in our community and help them. They also say that young people today don’t   23      about anything or anyone. However, I think the reason why we looked after older people was that we had no   24     . People had to live with their   25     and grandparents because they had no money. Young people today earn more and have more   26      to live where they want.

Their second argument is that in our day we didn’t expect to be given jobs ---and that young people now don’t look for jobs, but just complain（抱怨） about   27    . On the other hand, things were easier in the past and it was always easy to get a job if you had friends and contacts（关系）. It is really   28      today.

In conclusion I think there is hope for the   29      . This generation, like generations before them, has new   30       as well as old problems. If they learn from our mistakes the world will be a better place in future.

21. A. young                       B. old                                C. other                       D. our

22. A. old                    B. older                    C. elder                        D. eldest

23. A. know                         B. care                              C. complain                D. look

24. A. money             B. freedom                      C. choice            D. help

25. A. friends            B. children                        C. grandchildren       D. parents

26. A. freedom                   B. money                         C. reasons                  D. hope

27. A. future                       B. wages                           C. work                        D. unemployment

28. A. easier                       B. harder                         C. impossible    D. possible

29. A. young                       B. old                                C. future            D. generation

30. A. opportunities         B. hopes                           C. future            D. world

试述师生关系的特点及其影响。

下列不属于化学性突触传递特征的是（）。

A.单向传递原则

B.突触延搁

C.传递的易疲劳性

D.空间和时间的总和

E.内环境变化的不敏感性

女，52岁，绝经2年，间歇性 * * 排血水，盆腔有直径约10cm肿块。

与子宫内膜癌鉴别应选择的检查为（）

A. * * 镜检查

B.分段诊刮

C. * * 细胞学检查

D.B型超声检查

E.子宫输卵管造影

Km是酶的特征常数，在任何条件下，Km是常数。