What time is it? (看图回答)
____.
从右栏中选择与左栏对应的答语。
①How old is Wang Liang?____ A. It's a map.
②Are those your friends?____ B. They are rulers.
③What's that in English?____ C. I'm in Class Five.
④What are those?____ D. No, they aren't.
⑤What class are you in?____ E. He is nineteen.
如图所示,是利用每秒闪光10次的照相装置拍摄到的四个物体运动的闪光照片(友情提示:图中的黑点表示物体),其中可能受到平衡力作用的物体是( )