问题
单项选择题
变速器在使用过程中出现同时挂上两个档位的现象，这是由于（）机构失效导致。
A、自锁
B、互锁
C、杠杆
D、离合器
答案
参考答案：B
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变速器在使用过程中出现同时挂上两个档位的现象，这是由于（）机构失效导致。
A、自锁
B、互锁
C、杠杆
D、离合器
参考答案：B
| 用所给词的适当形式填空，每空限用一次。 | |
2. — I_________ my money so I can buy a car. — So am I. 3. Good boy! You're doing such a good job of _________ materials for me. 4. The old teacher used to get up before the sun _________ so that he could catch the early bus to work. 5. Every baby _____ the apple of the parents' eye. 6. As a volunteer, she _________ love and hate, sadness and happiness in the past ten years. 7. He thinks it necessary _________ his sister in his speech, who has supported him in his university study. |