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问题 填空题

（）的大小直接反映了直流电机换向性能的好坏。

答案

参考答案：火花

写作题
书面表达。
假设你是Jack，上个休息日你去了某个地方郊游，请给你的笔友Sally写一封e-mail，跟她谈谈你的这次郊游。
A. 内容须包括：
1. Where did you go?    2. Who did you go with?
3. How was the weather?4. What did you do?
5. Was the food good?6. Did you buy anything?
7. Do you want to go again?
B. 词数在60个左右，开头已给出，但不计入总词数。
Dear Sally,
        I just came back from                                                                                                                       
                                                                                                                                                              
                                                                                                                                                              
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选择题

“举头铁索路行空，电气能收夺化工。从此不愁鱼雁少，音书万里一时通。”此诗赞扬的是下列哪一项事业在日常生活中的作用 [ ]

A．铁路运输

B．航空运输

C．轮船运输

D．电报通讯
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