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【多选题】
用大流量蒸汽吹扫主蒸气管道时，吹扫前( )。A.
清水充洗
B.
空气吹扫
C.
及时排水
D.
先行暖管
E.
检查管道位移
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反馈参考答案：
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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