人的形体要注意几个重要的对比是（）的对比。
A.腰围和胸围
B.关节与肌肉
C.躯干与四肢
D.身高与体重
参考答案：B, C, D
I _____ ping-pong quite well, but I haven't had time to play since the new year. [ ]
A. will play
B. have played
C. played
D. play
可以作为证券市场的供给主体的是______。
A．上市公司
B．证券交易所
C．机构投资者
D．证券中介机构
