题目

如图所示为实验室常用的力学实验装置。实验前，首先取下钩码，将连接滑块上力传感器的细线保持与水平长木板平行，细线右端固定在木板外的某处，向左水平拉动长木板，记下力传感器的示数F0；然后将装置恢复原状。已知滑块的质量为m，实验过程中控制滑块的质量不变，重力加速度为g。请完成下列问题。(1)长木板与滑块之间的动摩擦因数________；(2)若用该装置做以下实验，下列说法正确的是________（填正确答案标号）；A．利用该装置探究滑块的从所给句子中选择恰当的句子完成下面的对话。（共5分，每小题1分）A: Hi, Lisa. Do you know that people are talking about the future dreams a lot  these days?B: 【小题1】__________A: Do you have a plan for the future? I mean what your dream is.B: Yes. I have a lot of dreams. But the greatest one is that I wanted to be a teacher.A: Sounds nice. 【小题2】___________B: Well, I’m going to study hard and do well in all the subjects.A: Anything more?B: And I’m going to play more sports to keep fit.A: Where are you going to work?B: I’m going to work in a village school in the poor areas. 【小题3】______________ I think to be a village school teacher is very great..A: That sounds exciting! But when are you going to start?B: 【小题4】___________.A: That’s good. 【小题5】_____________   B: I hope so. Thank you.