餐车电冰箱段修时，压缩机检修须按下列要求进行：活塞与连杆小头装配后，应能自由转动，其间隙要求在（）mm之间。
参考答案：0.01-0.06
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
水文频率计算
