【单选题】十进制126数其对应的十六进制数可表示为:
【判断题】( )单相半波整流电路,在输入电压v 2 变化的一个周期内,二极管承受的最高反向工作电压V RM 不低于二次电压V 2 。
【单选题】十进制126数其对应的十六进制数可表示为
【单选题】With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to _____.
A.
allow filtration of less viscous oil
B.
decrease the pressure drop across the filter
C.
improve overall filtration
【判断题】( )单相半波整流电路,在输入电压v 2 变化的一个周期内,二极管承受的最高反向工作电压V RM 不低于输入交流电的峰值电压 。
【判断题】如果刚体转动的角速度很大,那么 作用在它上面的力是否一定很大?
【单选题】The function of lubricating oil is to ___.
A.
reduce friction between moving surfaces
B.
provide even distribution of bearing wear
C.
reduce the accumulation of harmful detergents
D.
maintain a constant oil temperature output at each bearing
【单选题】If the detergent type lubricating oil being used in a diesel engine is black, the oil ___________.
D.
is holding finely dispersed carbon in suspension
【判断题】如果刚体转动的角速度很大,那么 作用在它上面的力矩是否一定很大?