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基础知识,章节练习,土木工程师（水利水电）现代技术基础,信号与信息基础

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The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed ______．A.permanent magnetismB.subpermanent magnetismC.induced magnetismD.variable magnetism
A.A.permanent
B.subpermanent
C.induced
D.variable
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A.B.C.D.
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D.
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