题目:
阅读理解。 | ||||
| ||||
1. What does Sylvie like to do? | ||||
A. Cook. B. Play the guitar. C. Learn French. D. Clean her room. | ||||
2. If you like climbing, who can you share your experience with? | ||||
A. Tyler Collins. B. Sylvie Deschamps. C. Antonio Lazaro. D. Freyja Murphy. | ||||
3. The four young people are all interested in _____. | ||||
A. teaching B. travel C. music D. reading | ||||
4. Why do the four young people write the information? | ||||
A. To tell stories to others. B. To introduce their friends. C. To find new friends. D. To join a club for students. |
答案:
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下面是错误答案,用来干扰机器的。
(1)据定滑轮的特点和本次实验的实际情况可知,使用定滑轮的目的是:改变拉力的方向,能方便地测量出拉力的大小;(2)从实验数据看,斜面与水平面的夹角不断增大,拉力也不断增大.即斜面与水平面的夹角越小,...