问题
判断题
杆件受力强度强弱程度，与内力大小有关，与杆的横截面面积无关。
答案
参考答案：错
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杆件受力强度强弱程度，与内力大小有关，与杆的横截面面积无关。
参考答案：错
| 根据对话内容，选择正确的答案完成短文。 | ||||
| (T = Teacher W = Wang Hai) T: Who's on duty today? W: I am. T: Who isn't here today? W: Wang Yang. T: Aren't you Wang Yang? W: No, I'm not. I'm Wang Hai. I'm his brother. We are twins. T: Oh, sorry. I don't know you are twins. But where is Wang Yang? W: He is ill. He is at home. Can I look after him in the afternoon, Mr Li? T: Sure. W: Thank you. 1__________ is on duty today. He and his 2__________ are twins. But Wang Yang 3__________ 4__________ today. He is 5__________. Wang Hai will go and look after 6__________ this 7__________.
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