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【单选题】
Which of the following is true of an asynchronous generator?A.
The generator uses brushes and slip rings
B.
The rotation and driving frequency are the same
C.
Permanent magnets are used
D.
There is no electrical connection to the rotor
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【单选题】Of the three sentences in each group, select the one that is NOT a sentence fragment.
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
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【单选题】Which statement is Not a sentence fragment?
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
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