A:do, play
B:play, doing
C:play, do
阅读判断,用“正确”或“错误”表示。
This is my classroom. It is not small. The windows are clean. There are many pictures in the classroom. We clean the door every day. I come to the classroom early in the morning. I do my homework in the classroom in the afternoon. I like my classroom.
用单摆测定重力加速度的实验装置如图1所示.
我们国家现在是和平时期,不需要加强国防?人民解放军在和平中起不到什么作用?
这种说法对吗?你是怎么看待这个问题的?说说你的看法。
在生物体生长发育的过程中,细胞分化的作用是( )