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问题 填空题

用双线桥标出以下方程式中元素化合价变化、电子转移及数目并指出氧化剂还原剂。

（1）4Al + 3O2 ="=" 2Al2O3     （2）2H2O2 ="== " 2H2O + O2↑

答案

略

填空题

选用括号内所给单词的适当形式填空。

1. Turn right on _____________ Avenue and the zoo is on your left. (nine)

2. Tom is _____________ on the beach now. He is very relaxed. (lie)

3. Mary's mother works ill a police station, she is a _____________. (police)

4. Please write to me and tell me about _____________ (you)

5. It's very warm today, it's a _____________ day. (sun)

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单项选择题

地图的可量测性主要体现在（）。

A.数学基础

B.地图语言

C.地图整饰

D.地图综合
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