问题
单项选择题
牵引电器中用来断开、接通电路的触头系统称为电器的（）。
A、指挥机构
B、传动机构
C、感测机构
D、执行机构
答案
参考答案：D
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牵引电器中用来断开、接通电路的触头系统称为电器的（）。
A、指挥机构
B、传动机构
C、感测机构
D、执行机构
参考答案：D
| 阅读下面短文，根据文中意思，从方框中选出恰当的词，并在下面对应题号的横线上写出各单词的完整、正确的形式使短文意义完整。 | |
first teacher when I was very little. Then, I had three 2 teachers in different schools. Now Miss Williams is one of my university teachers. I have never expected that I will be a teacher one day. I am a shy girl and I am afraid of 3 before many people. I do not know 4 to say. But I will be a teacher tomorrow! Tomorrow morning! I made this 5 just two weeks ago. Miss Williams, my English teacher, told me there was a teacher job, just for two weeks in this summer. She asked if I 6 be interested. I wanted to make some money, so I said "yes" to her. At once I regretted but it was too late to 7 my word back. There are about twenty foreign boys and girls in the class. They know very little English. I have 8 read the book that Williams gave me. Four of the lessons are very simple, in 9 too simple. I do not know what to do with these few simple words and sentences. I will read the lesson to them, and ask them to read after me, and then ask them to read it 10 . That will be about ten minutes. What shall I do next? 1._________ 2._________ 3. _________ 4. __________ 5.__________ 6._________ 7._________ 8. _________ 9. __________ 10.__________ |