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【单选题】
磁能生电是谁首先发现的?A.
法拉第
B.
阿拉果
C.
D.
奥斯特
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
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【单选题】保险可以从不同的角度进行定义。从风险管理角度看,保险是风险管理的一种方法,或风险转移的一种机制。它表明保险的作用在于()
A.
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B.
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C.
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D.
防灾防损、社会管理
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