除去下列物质中的少量杂质，所选试剂或操作方法不正确的一组是（）物质所含杂质除去

发布时间：2017-07-06 21:36 │ 来源：www.tikuol.com

题型：选择题

问题：

除去下列物质中的少量杂质，所选试剂或操作方法不正确的一组是（）

	物质	所含杂质	除去杂质的试剂或方法
A	NaOH	Ca（OH）₂	适量的Na₂CO₃
B	CuO	Cu	在氧气中的灼烧
C	CO₂	CO	点燃
D	O₂	H₂O	浓硫酸，干燥

考点：水（蒸气）的检验粗盐的提纯空气的检验物质的相互转化和制备

题型：选择题

完形填空。

    When I was three years old just before my sister was born, my mom asked me what we should name
the new baby. I said, "Let's call  1 Gravy (肉汁)!"
    You know, we pour gravy over meat and it tastes good! My parents found my  2 interesting, but named
the new baby Caroline, instead.
     Having a sister  3 my life. When my sister and I played together, we  4 got into fights and got angry with
each other if we did  5 wrong. It sometimes drove our parents crazy.  6 at the same time, we learned to
share our things and to forgive (原谅) each other when we got  7 .
     In North America, there are many kinds of families, but  8 families have a boy and a girl. Of course, some
have three or more. In China, most children  9 have brothers or sisters, and they have to learn those things in
other ways, which is more  10 .
     When I  11 away to university, my sister  12 me she wished I still lived at  13 . She wasn't used to getting
all the attention from my parents. But Chinese children get all the attention for all their life!
     Some middle school  14 in China wish they had a brother or sister. If you are one of them, I  15 a good
idea for you. Treat your friends and classmates as your brothers and sisters!

( )1. A. her
( )2. A. news
( )3. A. began
( )4. A. never
( )5. A. something
( )6. A. But
( )7. A. angry
( )8. A. few
( )9. A. shouldn't
( )10. A. beautiful
( )11. A. took
( )12. A. asked
( )13. A. home
( )14. A. students
( )15. A. give

B. him
B. idea
B. saw
B. again
B. everything
B. So
B. excited
B. several
B. don't
B. difficult
B. put
B. answered
B. work
B. teachers
B. have

C. me
C. lesson
C. changed
C. seldom
C. anything
C. Or
C. hungry
C. all
C. needn't
C. careful
C. moved
C. told
C. school
C. workers
C. learn

D. them
D. story
D. enjoyed
D. often
D. nothing
D. Through
D. worried
D. most
D. wouldn't
D. friendly
D. came
D. warned
D. family
D. lovers
D. make

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题型：选择题

电影（）的出现，宣告了“诗意现实主义”电影的终结。

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把一个正四面体的每个表面都分成9个相同的等边三角形，用任意颜色给这些小三角形上色，要求有公共边的小三角形颜色不同，问最多有多少个小三角形颜色相同( )

A．15
B．12
C．16
D．18

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矩形截面简支梁b×h=250mm×500mm，计算跨度l_o=6.5m，C25混凝土。配HRB335级纵向受拉钢筋，A_s=1256mm2。混凝土保护层厚度c=25mm。在均布荷载作用下弯矩标准值M_k=105.6kN*m。则使用阶段梁的最大扰度为（）mm。

A.28.4

B.29.50

C.31.01

D.33.2

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题型：选择题

某公司发行限为5年的公司债券，成列为流动负债的情况有（）。

A.债券持有人要求将公司债券提前兑现时

B.债券在1年内到期，而且须以流动资产予以偿还时

C.债券发行公司违反契约规定，按规定条款须提前偿还时

D.该公司与其他公司合并

E.公司扩股或改制时

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