液压传动有（）装置组成。
A.动力结构
B.执行结构
C.控制装置
D.高压风力
参考答案：A, B, C
关于T2，正确的说法是
A．横向弛豫
B．纵向弛豫
C．横向弛豫时间
D．纵向弛豫时间
E．纵向磁场恢复到原来37%时所需要的时间
_______Today is a fine day,and I will go on a trip to the countryside for the fresh air.
_______Have fun_, and_______yesterday.
A．so it was.
B．so was it
C．it was so.
D．it was
