实验室用下列两种方法制氯气：①用含HCl146g的浓盐酸与足量的MnO2反应；②

根据首字母提示或括号内的汉语意思拼写单词。

1. Mr. Watson's _____ (每年的) income is US $20,000.

2. I w_____ the traffic accident by chance.

3. The young man dived to a d_____ of 40 feet.

4. He grabbed her and d_____ her away.

5. After a brief p_____ the speaker continued.

6. There was a garden on the _____ (对面的) side of the street.

7. My friends _____ (敦促) that I (should) apply for the job.

8. The broken bike was found a_____ by the river side.

9. The waves gently lap against the s_____.

10. The frightened people f_____ from the fire.

某运动员男22岁，因外伤致右股骨颈头下型骨折，行加压螺纹钉内固定术后半年下地负重，近来逐渐髋部疼痛，X线股骨头变形、变扁，其最可能的情况是什么（）

A.加压螺纹钉松动

B.骨折未愈合

C.加压钉过深过长刺激髋臼

D.股骨头缺血性坏死

E.髋关节迟发性感染

变性分为哪几种？

馈线从馈线窗下方进入机房：室外地排安装于馈线窗下方，水平走线架下的机房墙面上，避免馈线（）现象

A、交叉

B、第三点接地上翻

C、第三点接地下翻

大型电力系统的优点之一是可以提高运行的灵活性，减少系统的备用容量。