一组数据均同乘(同除)一个常数(不为0或1的数)后()。A.均数不变 B.标准差不变

题型:单项选择题

问题:

一组数据均同乘(同除)一个常数(不为0或1的数)后()。

A.均数不变

B.标准差不变

C.中位数不变

D.变异系数不变

E.以上都变

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题型:单项选择题

顺式作用蛋白质

题型:单项选择题

第二节完型填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,掌握其大意,然后从36—55各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A Man Named Lawrence

This is an act of kindness that happened to me one Sunday morning.

It was at two o’clock in the morning. We just came out of a club and were trying to find our   36   back to our city. As we were trying to   37   the bus stop, a man came to us and said he would show us   38   it was. Although we were a little worried, we had no choice but follow him. He told us he was a homeless man and that his name was Lawrence.

When we passed some city workers   40  the streets, they sprayed (喷溅) the homeless man. Lawrence told us that they always sprayed the   41   if they were "in the way". I didn’t know why they would do that. They were human beings,   42  , not cattle or objects.

This man had just gotten   43  in the middle of a cold night, but  44  shouting at the workers, he asked them, "How would you   45  if your father or grandfather were treated like this?" He then told us, "It’s   46  use shouting at them, because they just get angry. You’re better off saying something from the   47  ."

It is   48  ! The world could be so different if only we put our anger  49  , lowered our voices and tried to speak from our hearts.

He took us safely to the stop and on the way talked about everything. We   50  him and told him that we   51  have never found the place on our own. He said, "I have a son of your age, and I hope that if he were   52  , someone would help him."

Not only did Lawrence clear out all the fear and distrust in our hearts, he helped us find our way, in more than one ways.   53  , this man taught us kindness. There was   54  we could really do to repay him. The only thing I hope to do is to   55  other people out.

36.A.way  B.car    C.friend       D.road

37.A.get to       B.find   C.search for D.arrive

38.A.how  B.what  C.which       D.where

39.A.interested  B.annoyed    C.worried    D.disappointed

40.A.wondering on   B.washing    C.painting for      D.decorating

41.A.blacks      B.whites      C.strangers   D.homeless

42.A.above all  B.in all C.after all    D.not at all

43.A.wet B.angry       C.sad    D.cold

44.A.except for B.shortly after     C.instead of  D.owing to

45.A.think B.feel   C.tell    D.say

46.A.no use      B.no point    C.no need    D.no fun

47.A.corners     B.eyes  C.bottom     D.heart

48.A.good B.beautiful   C.true   D.funny

49.A.aside B.off    C.down D.up

50.A.left   B.thanked    C.paid  D.brought

51.A.should      B.could C.must  D.need

52.A.waited for B.taken in    C.lost   D.missed

53.A.On the contrary       B.On the other hand    C.What’s up D.What’s more

54.A.something B.anything   C.everything       D.nothing

55.A.help  B.work C.pay   D.check

题型:单项选择题

哪一项不符合化脓性脑膜炎的脑脊液改变()

A.压力增高

B.外观混浊

C.氯化物正常

D.蛋白增高

E.糖正常

题型:单项选择题

( )作为索赔文件的组成部分,在很大程度上关系到索赔的成功与否。

A.索赔信息

B.索赔内容

C.索赔证据

D.索赔记录

题型:单项选择题

起重机的工作级别是()起重机基本能力的()参数。

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