通货膨胀促进论主要是______的主张。( )
A．凯恩斯学派
B．托宾
C．弗里德曼
D．货币学派
参考答案：A
A survey of the opinions of experts ______ that three hours of outdoor exercise a week _____ good for one’s health.
A．show; are
B．shows; is
C．shoe; is
D．shows; are
凝汽器真空缓慢下降的原因有（）
A.后轴封供汽中断
B.循环水量不足
C.凝汽器水位升高
D.真空系统不严密
