问题
单项选择题
焊缝单探头探伤时，缺陷的埋藏深度可用公式（）计算。
A、h=S•cosβ
B、h=S•sinβ
C、h=K×L
D、h=S/cosβ
答案
参考答案：A
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焊缝单探头探伤时，缺陷的埋藏深度可用公式（）计算。
A、h=S•cosβ
B、h=S•sinβ
C、h=K×L
D、h=S/cosβ
参考答案：A
| 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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