氩气精炼的作用？

单词拼写(根据句意、首字母或中文提示用正确形式写出下列单词,

每空一词.提示:必须用必修五、选修六所学新单词.

1.His report was c__________(不断地) interrupted by applause.

2. Can you telephone me at your c_________ to arrange a meeting?

3. Destruction of the environment is one of the most serious ____________(挑战) we face.

4. Her father didn't a_____________ of her marriage to him, which made her very sad.

5. The teacher and his students are d_________ (高兴的)with the result of the experiment.

6. After some repeated a________, they finally succeeded in winning the competition.

7. Is now an a_________(适当的)time to call on Professor Simpson? ?

8. The washing machine is fully __________. (自动的)

9. The monitor gave a present to their headmaster on b_________ of all the students.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           10. He was a_____________ as captain of the English team.

朝阳小学买5个足球用去了340元．学校还想再买13个这样的足球，还需要准备多少钱？

中国甲公司与美国乙公司于1995年10月签订了购买4500吨化肥的合同，由某航运公司的“碧海”号将该批货物从美国的旧金山港运至青岛港。“碧海”号在途中遇特大暴风雨，船到目的港后发现货损，经检验属于货舱温度超过正常要求所致。下列关于货物责任的选项哪个是正确的( )

A．承运人应赔偿货物损失

B．承运人可依海商法的规定免责

C．乙公司应自行承担此项损失

D．甲公司应承担货物的损失

（6分）0.2mol有机物A和0.5molO₂在密闭容器中燃烧后的产物为CO₂、CO和H₂O。产物经过浓H₂SO₄后，质量增加10.8g;再通过灼热的CuO充分反应后，固体质量减轻3.2g;最后气体再通过碱石灰被完全吸收，质量增加17.6g。

（1）试推断该有机物的化学式。

（2）若0.2mol该有机物恰好与4.6g金属钠完全反应，试确定A的结构简式。

（3）试写出A的不与金属钠反应的同分异构体。

暴风客热相当于西医学之：

A．麦粒肿
B．沙眼
C．热性疱疹
D．急性卡他性结膜炎
E．急性传染性结膜炎