题目:
根据对话内容,选出方框中所给的句子补全对话。
A: You don’t look well today. 小题1:_
B: I’m not feeling well. I have a headache.
A: I am sorry to hear that. 小题2:
B: About two days ago. And maybe I have a fever now.
A: That’s too bad. 小题3:
B: Yes, I think so. I’ll go right now.
A: I hope 小题4:_
B: 小题5: Goodbye!
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:P物体受重力、细绳的拉力、Q对P的支持力和Q对P的摩擦力作用;Q受到重力、墙对小球的支持力、P对Q的压力及摩擦力作用;对小球P及Q的整体,绳子的拉力,所以若绳子变长,减小,绳子的拉力将变小;...