皮皮学，免费搜题
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【单选题】
下列费用属于施工机械使用费的是（）。A.
运输损耗费
B.
材料运杂费
C.
折旧费
D.
临时设施费
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】unit 1 page 7 passage
【单选题】Now children, turn to Page _____ and look at the _____ picture in Unit 1.
A.
Twentieth, one
B.
Twenty, one
C.
Twentieth, first
D.
Twenty, first
【简答题】What is shielded metal arc welding?
【简答题】A: Could you introduce this welding equipment to me? B: Sure. The welding equipment is called a wire feeder . A: What are the main parts of it? B: The main parts of it are: handle , wire reel , wire d...
【单选题】What is the temperature in an electric arc welding?( )
A.
50-60°C
B.
500-600°C
C.
5000-6000°C
D.
None of the above
【单选题】What is the main function of a welding machine?
A.
Supplies the power source for arc welding.
B.
Generates the electricity.
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