用于滚动轴承的磨损和损伤的故障诊断的方法称为()。
A. 以振动脉冲测量法判断异常振动
B. 以频率分析法诊断异常振动
C. 以振动总值法判别异常振动
D. 以振动振幅法判别异常振动
查看答案
在评价两个相互排斥的投资方案时应该着重比较其各自的内含报酬率。()
A. 正确
B. 错误
Financial intermediaries can substantially reduce transaction costs because their large size allows them to take advantage of______.
A. poorly informed consumers
B. standardization
C. economies of scale
D. their market power