问题
单项选择题
材料强度较低，受力较小的构件，铆接时一般选用（）的铆钉。
A.材料强度较高
B.材料强度较低
C.钢铆钉
D.铝铆
答案
参考答案：B
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材料强度较低，受力较小的构件，铆接时一般选用（）的铆钉。
A.材料强度较高
B.材料强度较低
C.钢铆钉
D.铝铆
参考答案：B
| 从方框中选择最恰当的选项完成下列对话，并将答案填写在相应的横线上，方框中有两个选项 是多余的。 | |
| L: Hello, Pan Wei. Is this your new car? How beautiful! P: Hi, Lisa. Would you like to go for a ride with me? L: Great! P: …Well, you don't have to wear the seat belt. 1_______ L: I'm sure you are. You know, not every driver is as good as you. P: 2_______ No one will stop us right now. L: Oh, no, no. We obey the traffic rules not for the police. 3_______ P: I agree, but I feel uncomfortable with it. L: That's true, a little. 4_______ Otherwise you will go flying when your car is terribly hit. P: 5_______ I am wearing it. Do you know who invented it? The man should be remembered. L: Sorry, I don't know, cither. But Volvo, a famous Swedish car maker, was the first to use seat belt in 1849. | |
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