复合投影片一般不超过几张投影片（）
A.3
B.4
C.5
D.6
参考答案：B
- You look exhausted!
- I __________ tennis with my friend all the morning.
A．played
B．had played
C．have been playing
D．will play
台军作战指导思想中有限压制滞敌攻势的内容是什么？
