下列资料中可用均数与标准差全面描述其特征的是A．正偏态分布 B．负偏态分布 C．正态

发布时间：2017-05-28 08:28 │ 来源：www.tikuol.com

题型：单项选择题

问题：

下列资料中可用均数与标准差全面描述其特征的是

A．正偏态分布

B．负偏态分布

C．正态分布和近似正态分布

D．对称分布

E．泊松分布

考点：卫生资格考试(中初级)疾病控制基础知识疾病控制主治医师基础知识1

题型：单项选择题

设N_A为阿伏加德罗常数，下列说法正确的是：

A．标准状况下，5.6 L四氯化碳含有的分子数为0.25N_A

B．标准状况下，14 g氮气含有的核外电子数为5N_A

C．标准状况下，22.4 L任意比的氢气和氯气的混合气体中含有的分子总数均为N_A

D．标准状况下，铝跟氢氧化钠溶液反应生成1 mol氢气时，转移的电子数为N_A

查看答案

题型：单项选择题

读图，回答以下2题。

小题1:该地区成为著名旅游地的优势在于(　　)

A．地处热带，风景优美，环境承载量大

B．景观具有春翡夏翠秋金冬银的季节特点

C．地质地貌景观独特，具有较高的游览价值

D．水陆交通通达性好，旅游地吸引半径大小题2:与图示地区农业地域类型相同的地区是

A．西欧平原

B．湄公河三角洲

C．五大湖沿岸

D．墨累-达令盆地

查看答案

题型：单项选择题

     During the years of depression(萧条), food and money were very hard to find and people had to trade
things with each other.
     One day I was   1   some potatoes from Mr Miller. I noticed a small poor boy hungrily   2   a full
basket of freshly picked green peas. Then I was  3 to see that Mr Miller sold the boy a bag of peas fo
r just a marble (弹球).
     Mrs Miller, who had been standing nearby,   4_ and told me that Mr Miller loved to trade with the
three boys in the village for peas, tomatoes, and other things   5 he didn't really need any marbles. I left
the stand, smiling to myself,   6   by this man.
     Several years went by. One day I learned that Mr Miller had died. I took part in the funeral(葬礼),
_7   three young men . They came over to Mrs Miller, hugged her, kissed her on the cheek, spoke with
her and moved on,   8 their eyes.
     Our   9 came to meet Mrs Miller. I mentioned  10    she had told me about the  11 She told me, "
Those three young men above were the boys I told you about. They just told me   12 they appreciated
the things Jim 'traded 'with them. Now, at last, they came to pay their debt."
      "We've   13   had a great deal of the wealth in this world," she  14 , "but right now, Jim wouldW#W$ W%.K**S*&5︿U consider himself to be the   15   man."
      Then she gently lifted the  16     fingers of her husband. Resting underneath were three red marbles.
     At that time I realized that we would not be   17    by our words, but by our kind   18 . It is said that
it takes a minute to find a   19 person, an hour to appreciate him, a day to love him, but an entire life to
20   him.

( )1. A. buying
( )2. A. reaching for
( )3. A.  astonished
( )4. A. turned over
( )5. A. but
( )6. A. suspected
( )7. A. discovering
( )8. A. closing
( )9. A. time
( )10. A. the story
( )11. A. marbles
( )12. A. why
( )13. A. ever
( )14. A. laughed
( )15. A. honest
( )16. A. lifeless
( )17. A. thought
( )18. A. deeds
( )19. A. strict
( )20. A. ignore

B. selling
B. glancing at
B. amazed
B. going over
B. otherwise
B. impressed
B. watching
B. rolling
B. chance
B. the proverb
B. men
B. how
B. always
B. cried
B. happiest
B. regretless
B. touched
B. things
B. honest
B. forget

C. borrowing
C. staring at
C. annoyed
C. came over
C. or
C. regretted
C. finding
C. cleaning
C. turn
C. the legend
C. debt
C. when
C. never
C. sighed
C. coldest
C. useless
C. remembered
C. remarks
C. special
C. recognize

D. hunting
D. picking up
D. worried
D. coming over
D. although
D. embarrassed
D. seeing
D. wiping
D. decision
D. the joke
D. life
D. what
D. seldom
D. added
D. richest
D. hopeless
D. affected
D. rewards
D. learned
D. remind

查看答案

题型：单项选择题

完成句子。

1. 今天早晨我上学迟到了并且把家庭作业忘在家里了。

_______________________________________________

2. 她说她不再生我的气了。

_______________________________________________

3. 正当我在沿着大街走的时候我看到了这次事故。

_______________________________________________

4. 你认为在未来将有较少的污染吗？

_______________________________________________

5. 他和我买了一样的字典。

_______________________________________________

6. 你的衣服过时了，你应该买一些新的了。

_______________________________________________

查看答案

题型：单项选择题

合理、精简的机构设置使得甲县卫生局的工作效率非常高，甲县卫生局的部门结构与乙县卫生局十分相似。因此乙县的卫生局工作效率也会很高。下列最能反驳上述结论的是（）。

A．乙县卫生局的部门结构未必与甲县的相同

B．两县卫生局的工作人员数量有较大的差异

C．工作流程的设置对工作效率有重要影响

D．甲县卫生局的不同部门的工作效率有高有低

查看答案

更多题库