如图所示,将重2牛的茶杯放在水平桌面上,请用力的图示法在图中作出茶杯所受的重力.
先选出比例尺为1N.然后过杯子的重心作竖直向下的力即为比例尺的两段线段的长度.如图所示
根据汉语完成句子。
1. 我长大了想当一名工程师.
I'm going to __________________when I grow up.
2. John4岁时会骑自行车.
John ______________________ at the age of 4.
3. 这个箱子太重,我搬不动.
The box is _________ for me __________ carry.
4. 我们数学老师比语文老师严肃.
Our math teacher ________________________ than our Chinese teacher.
5. 由于这场雨,昨天他没去北京.
He didn't go to Beijing ________________ the rain.
6. 让我为你整理床铺吧!
Let me __________________________ for you.
7. — 他怎么了? — 他肚子疼.
— What's the matter with him?
— He _________________________.
8.我爸爸星期二要动身去香港.
My father ______________________ Hong Kong on Tuesday.
9. 我打算搬到一个安静的地方.
I am going to move _________________________.
10. Tom打算学一门外语.
Tom is going to ___________________________.
下列几个峡谷中最深的是()
A.虎跳峡
B.三门峡
C.刘家峡