单项选择题
The sub-multiple prefix "milli" (m) means （）.
A.one thousandth (10 to the -3rd power)
B.one millionth ( 10 to the -6th power)
C.one billionth ( 10 to the -9th power)
D.one trillionth (10 to the -12th power)
点击查看答案&解析
相关考题
-
单项选择题
A “dead front” switchboard is one （）.
A.without switches on it
B.with insulated switches and no exposed terminals
C.without circuit breakers
D.without safety hand nails nor rubber mats -
单项选择题
The total resistance of a parallel circuit is always （）.
A.larger than the greatest branch resistance
B.smaller than the lowest branch resistance
C.equal to the sum of the individual branch resistances
D.one-half the sum of the individual branch resistances -
单项选择题
Reduced voltage applied to a motor during the starting period will （）.
A.result in decreased acceleration time only
B.lower the starting current and increase accelerating time
C.cause a greater starting torque
D.increase the starting current and pump capacity
