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【单选题】
Which one is not hot pipe?A.
The steam pipe.
B.
The exhaust pipe.
C.
The fuel oil pipe.
D.
The sea water pipe
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反馈参考答案：
举一反三
【简答题】触发角越 _____ ,整流输出的电压、电流越有效值越 小 ,整流输出脉动越 _____________ 。
【单选题】By saying that 'It's an image that will boggle the mind for years to come', (Paragraph 3) the author means that the debate in Seattle proves to be ______.
A.
dubiously-oriented.
B.
quite transient.
C.
self-contradictory.
D.
fairly consequential.
【简答题】如何对事物和现象的阴阳属性进行划分？
【单选题】The word 'it' underlined in Paragraph 3 means______.
A.
Mozart's correspondence
B.
the collection of Mozart's music
C.
the power that drove Mozart
D.
Mozart's life and death
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