移动活塞式空压机最大排气压力为（）
A.0.6
B.7
C.0.8
D.0.9
参考答案：C
给一个正方形的边长增加10%，周长增加______%，面积增加______%．
— Are you content with Ang Lee's new film Life of Pi?
— Not a little. It couldn't be ________.
A．any better
B．any worse
C．so bad
D．the best
