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问题 选择题

中国青铜艺术的奇葩--马踏飞燕，出自于东汉时期。青铜乃铜锡合金，明代宋应星所著《天工开物》曾记载下列炼锡方法：SnO2+2C Sn+2CO↑。上述反应属于 [ ]

A.置换反应

B.分解反应

C.化合反应

D.复分解反应

答案

答案：A

填空题

单词拼写。

1. For him, this will be an e____ new job, so he isn't sure of it.

2. The windows haven't been cleaned for at least a year and are d____ now.

3. I tried to tell her but she ____ (不理睬) me

4. I'm rather ____ (挂念) about my brother's health.

5. Milk is the ____ (自然) food for young babies. 6 Forces are ____ (蕴藏) in the masses.

7. He went to town with the ____ (目的) of buying a new television.

8. We are asked to learn about some ____ (交际) skills in this unit.

9. Since the weather is so fine, let's go o____.

10. They come from Germany. They are G____.

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单项选择题

公房出售单位，从售房款中一次性提取住宅专项维修资金，其中，高层住宅按不低于售房款的( )提取。

A．10%

B．20%

C．30%

D．40%
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