设备振动应采取的措施是（）。
A.紧固底角螺栓
B.电机找正
C.检查联轴器
D.检查机械密封
参考答案：A, B, C, D
—Would you rather come on Friday or Saturday?
—________________.
A．Yes, of course
B．The other is better
C．That's ok
D．Either would suit me
适用自动发卡机中的IC卡厚度范围是（）。
A、0.5mm-0.8mm
B、0.6mm-0.8mm
C、0.5mm-1.0mm
D、0.6mm-1.0mm
