When paralleled, AC generators must have the same _____.

When measuring AC current flow, you must always connect the meter _____.

It _____ for an emergency generator to require paralleling.A.is usualB.is not usualC.is ne

When paralleling two AC generators, the frequency of the machine coming on－line, immediate

Hardly_____when the parrot flew out and settled in the same tree as the cat.A．had Mary ope

When Joan gave birth【C1】______the first boy in her family in three generations, she and he

He must have been very nervous when speaking. Did you _____ that his hand was shaking