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问题 填空题
从方框里选择正确的短语，并用其正确的形式填空。
run out, make sense, stay up, by chance, try out, make up pick up, leave out, let out, take it easy
1. We are___ new teaching methods.
2. It happened quite___ but some people take it serious- ly.
3. Hey, your serve is too fast. ___,okay?
4. The children wanted to___ and watch television.
5. Farm workers___ only a small section of the population.
6. He is completely ___and he has to have a complete rest.
7. The prisoners were___ to work in the garden.
8. She soon___ French when she went to live in France.
9. Doing that does not___ but Tom listens to nobody.
10. She___ the date on the cheque.
答案

1. trying out 2. by chance 3. Take it easy 4. stay up 5. make up

6. run out 7. let out 8. picked up 9. make sense 10. left out

填空题

（12分）（1）环境专家认为可以用金属铝将水体中的NO3-转化为N2，从而消除污染。该反应中涉及的微粒有：H2O、Al、OH－、Al(OH)3、NO3-、N2，请将这些微粒中除NO3-以外的微粒填入以下空格内（不用配平）。

该反应过程中，被氧化与被还原的元素的物质的量之比为                  。

（2）我国首创的海洋电池以海水为电解质溶液，电池总反应是4Al ＋3O2＋6H2O ="4" Al(OH)3。电池正极的电极反应式是                ；消耗13.5 g Al时转移_________mole-。

（3）铝与某些金属氧化物在高温下的反应称为铝热反应，可用于冶炼高熔点的金属。

已知：4Al(s) ＋3O2(g) = 2Al2O3(s)△H = －2830 kJ/mol

 △H = ＋230 kJ/mol

C(s)＋O2(g) = CO2(g) △H = －390 kJ/mol

铝与氧化铁发生铝热反应的热化学方程式是                    ，铝热反应属于______（填字母）反应。

a．氧化还原       b．复分解      c．置换
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单项选择题

接入网设置中指定扇区相关的DRC覆盖的索引为（）.

A.DRC Value

B.DRC Cover

C.DRC lock

D.DRC sector
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