初中毕业复习时,小珊对所学部分化学知识归纳如下,其中有错误的一组是[ ]A.现象

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问题:

初中毕业复习时,小珊对所学部分化学知识归纳如下,其中有错误的一组是[ ]

A.现象与变化①铁锅生锈--化学变化
②干冰升华--化学变化
③铜变成铜绿--化学变化
B.性质与用途①N2性质稳定--填充食品袋防腐
②CO2不燃烧,也不支持燃烧--用于灭火
③石墨疏松多孔--可作吸附剂
C.物质与结构①甲烷--由分子构成
②铝--由原子构成
③食盐--由离子构成
D.“低碳”与环保①改造或淘汰高能耗、高污染产业
②研制和开发新能源替代传统能源

③减少使用一次性餐具

考点:构成物质的微粒(分子、原子、离子)常见污染的来源、危害及治理物理变化和化学变化的特征和判别氮气的性质和用途金刚石、石墨、C60的结构和用途
题型:选择题

阅读理解。

I'm daydaytest Placeholder!

  Mr.  Smith never watched TV.  He thought that people spent too much time

watching it.  Some of his friends often talked about sports shows,  the movies and

plays. Mr. Smith said to himself,  "They never read any books or go out in the

evening. " So he didn't buy a TV.

  Two years ago,  Mr. Smith was 60 years old.  He stopped working in the

hospital.  His son bought him a TV.  He began to watch all the news.  He knows

much more about the world now.  And he reads more books,  too.

  Now,  Mr. Smith will get very unhappy if you trouble(打扰) him when he

is watching TV.  I can't know that one can change(改变) his idea when he is 60.

1. Mr. Smith didn't watch TV because _____.

A. he had no time to watch it

B. he thought it took (占用) people much time to watch TV

C. he couldn't buy the TV set

D. he thought watching TV is bad for people's eyes

2. Mr. Smith _____ when he worked in the hospital.

A. went to mountains

B. played sports    

C. read books  

D. watched TV

3. Mr Smith didn't work in the hospital _____.

A. after he was 60

B. before his son bought him a TV

C. when his son asked him not to work

D. after he liked watching the news

4. Mr. Smith is _____ now.

A. 58

B. 60

C. 62

D. 61

5. The black word "unhappy" means _____ in Chinese.

A. 很高兴

B. 很和蔼

C. 不高兴

D. 不理解

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煤量计量装置不是发电厂的输煤系统设备。()

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什么叫划线时的借料?

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功能点技术的信息域包含()()、()、()、()等5个方面的信息。

题型:选择题

1941年1月17日,周恩来在《新华日报》题写了:“千古奇冤,江南一叶;同室操戈,相煎何急?!”的题词,揭露国民党顽固派制造()的真相。

A.晋西事变

B.皖南事变

C.平江惨案

D.确山惨案

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