题目

完成对话从方框中选出最佳选项。A. It was cool and cloudy.B. Did you go with anyone?C. Did you go there by train?D. How did you like the people there?E. When did you go there?F. It was clean.G. Where did you go?W: Hi, Alex! Did you have a great vacation? M: Yes, I did. W: 51.【1】M: I went to Beijing. W: 52.【2】M: Last Saturday. W: 53.【3】M: Yes. I went with my cousins Peter and Bill. W: How was the weather there? M: 54.【4】W: Did you eat anything special there? M: Yes. We ate Beijing duck. W: 55.【5】M: They were very friendly and I liked them.如图所示，小球从水平位置静止释放，设小球通过最低点时的速度为v，角速度为ω，加速度为a，绳的拉力为T，那么随着绳子L的增长（ ）A．v、a都增大 B．ω、a都减小 C．T、a都不变 D．v增大，ω减小