电机内绕组短路时电机容易跳闸，甚至引起电机“崩烧”。
参考答案：对
Mary is a humorous and warm-hearted woman and that is she is a most popular person in her community．
A．why
B．because
C．how
D．whether
开通记账式国债柜台交易，应收取（）元开户费。
A、5
B、10
C、15
D、20
