单项选择题
A.one B.less than one C.more than one D.negative one
The alternating current generator supplying a load has ...
单项选择题The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop （）.
A.is small B.may be neglected C.is useful D.is considerable
After the trouble of the automatic control system has b...
单项选择题After the trouble of the automatic control system has been completely eliminated, assistance is （） required.
A.remained B.still C.no longer D.much mere
（） is the actual value of the controlled condition.A.De...
单项选择题（） is the actual value of the controlled condition.
A.Desired value B.Set value C.Measured value D.Deviation
