问题
单项选择题
二力平衡原理适用于（）.
A.刚体
B.变形体
C.刚体和变形体
D.流体
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
二力平衡原理适用于（）.
A.刚体
B.变形体
C.刚体和变形体
D.流体
参考答案：A
| 短文改错。 此题要求改正所给短文中的错误。对标有题号的每一行做出判断：每行只有一个错误，请按下列情况改正： 该行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜 线划掉。 该行缺一个词：在缺词处加一个漏字符号（  ），在该行右边横线上写出该加的词。该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。 | |
| In England boys and girls usually have two months to rest after the final exams. Not only the rich but also factory workers or bus drivers can take our children to the seaside for their holidays. Why do children like spending their summer holidays on the seaside? It is because that they like the sand, the cool wind and the salt water there more than anything else. Of course, there are plenty of new things to see, nice things to eat and excited things to do, but it is the feelings of sand under one's feet, of cool wind on one's skin, and of warm sun on one's back that make the seaside what it was. | 1. _____ 2. _____ 3. _____ 4. _____ 5. _____ |