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【单选题】
同步电动机与异步电动机比较，其优点是（ ）。A.
功率因数可调
B.
结构简单
C.
启动方便
D.
价格低廉
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反馈参考答案：
举一反三
【单选题】What is the main idea of this passage?
A.
Many people work long hours but do not always do a lot of work.
B.
Most people can get more work done by working longer hours.
C.
Most Americans work 80 hours a week, and some work even longer.
D.
People can make more money by working longer hours.
【简答题】状态栏从左往右风别是用于显示当前文档的页数/总页数、( )、( )、( )、( )和( )。
【单选题】The write was surprised at what he received for Sunday lunch because______.
A.
food had always been plentiful at home
B.
he had been used to grimmer times at home
C.
things had been difficult after the war up North
D.
beef had always been available from the butcher on the corner at home
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