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【简答题】
变压器主要由铁芯和____两个基本部分组成。
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知识点:
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皮皮学刷刷变学霸
举一反三
【单选题】铸坯产生皮下气泡的主要原因是脱氧不良、钢水气体含量过()
A.
B.
C.
D.
【单选题】PLC程序的检查内容不包括
A.
指令检查
B.
梯形图检查
C.
继电器检查
D.
软元件检查
【简答题】阅读理解。 At the shopping mall, you probably think about spending, not saving. Think about all the lights that keep the mall bright. Think about all the water faucets (水龙头) in the toilet. Think about all ...
【单选题】【B3】
A.
think
B.
think of
C.
think about
【简答题】铸坯皮下气泡产生的原因是什么?
【单选题】连铸坯产生皮下气泡的原因是()。
A.
钢水中气体含量高
B.
结晶器冷却不均匀
C.
轧制操作不当
D.
浇注温度过低
【单选题】皮下气泡产生的原因是( )。
A.
结晶器变形
B.
振痕太深
C.
钢中氧含量过高
D.
钢水温度不均
【单选题】Air Pollution When people think about air pollution, they usually think about smog, acid rain, CFC's, and other forms of outdoor air pollution. But did you know that air pollution also can exist insid...
A.
Y
B.
N
C.
NG
【单选题】皮下气泡产生的原因是( )。
A.
钢水温度不均
B.
振痕太深
C.
结晶器变形
D.
钢中氧含量过高
【单选题】Who do you _____is the funniest actor?
A.
think
B.
think over
C.
think of
D.
think about
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