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【单选题】
下面用作低压配电网络和电力拖动系统中主要用作短路保护的电器是A.
断路器
B.
接触器
C.
继电器
D.
熔断器
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皮皮学刷刷变学霸
举一反三
【简答题】当进口道向右侧展宽且左转车道从直行车道分出时,应设置________。
【单选题】If the company’s name and address are preprinted on the letterhead, the letter begin with ( )
A.
Salutation
B.
Body of letter
C.
Date line
D.
Subject line
【简答题】How do you handle the preprinted invitations?
【单选题】Preprinted leaflets and brochure can be inserted into the newspaper or magazine supple-ments．They are charged per thousand copies against the total quantity distributed．
A.
The inserted leaflets and brochure will be found in the magazine．
B.
Leaflets and brochure are charged on the basis of the quantity．
C.
The inserted leaflets and brochure are charged according to the price of the newspaper．
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