问题
单项选择题
四连杆机构中必定（）。
A.有三个连杆固定
B.有两个连杆固定
C.有一个连杆固定
答案
参考答案：C
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四连杆机构中必定（）。
A.有三个连杆固定
B.有两个连杆固定
C.有一个连杆固定
参考答案：C
| 根据对话内容，抄写符合对话情景的句子。选项中有项是多余的。 A: __1__ B: I'm going to a supermarket with Albert. A: How are you going? B: __2__ Albert just learnt to drive a car. A: I'm afraid you can't go with Albert. I don't think sixteen-year-olds should be allowed to drive __3__ B: But I have to go there, Ann is getting her ear pierced and l want to watch. A: Really?__4__ B: I agree, but it's fun to watch. Is it OK if we take the bus? A: Well,I guess so. B: Great I want to buy a new sweater, too. A: What kind are you going to buy? Maybe I should go with you, B: I'm not a child, __5__ A: Well, I just want to be sure you get something nice.
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