问题
判断题
一个物体受到一组力作用后,如不发生平移直线运动,则各作用力的合力为零。( )
答案
参考答案:对
一个物体受到一组力作用后,如不发生平移直线运动,则各作用力的合力为零。( )
参考答案:对
Here is the bulletin board in Class 2. Some of the notes can be seen every day. Here are some notes before a holiday. Please read them and answer the following questions.
小题1:The meaning of “bulletin board” is _________.
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