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问题 填空题

如图所示电路，使灯L1、L2串联，应闭合开关_________ ，断开开关 _________ ；要使L1、L2并联，应闭合开关_________ ，断开开关_________ ；如果闭合S1、S3，断开S2，灯_________ 亮；如果闭合开关 _________ 会出现短路，这绝不允许．

答案

S1；S3、S2；S3、S2；S1；L2；S1、S2

单项选择题

《教师法》规定，建立正常晋级（）制度，具体办法由国务院规定。

A．增发奖金

B．增加福利

C．薪水持平

D．增薪
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填空题

根据句意和首字母或汉语提示写出句中所缺单词，每空一词。

1. Zhijin Cave is known as the most beautiful underground  _______ (宫殿) in the world.  

2. Susan usually has  some pieces of b_______  and a bottle of milk for breakfast.       

3. In English the first name is the g_______   name.                                     

4. Spring is the best time for p_______  trees.                                          

5. — Excuse me. Are you f_______  now?                                                  

   — Sorry, I'm very busy.                                                              

6. It's ten  _______  (分钟) walk.                                                   

7. He  _______  (使用) a lift to go up and down every day.                            

8. Food must be  _______  (保存) in cool places in summer.                        

9. We often listen to our teacher _______  (认真) in class.                          

10. With the d_______  of computer science, more and more work will be done by computer.
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