某学生用托盘天平称量5.4g固体物质,称量时,他将药品和砝码的位

某学生用托盘天平称量5.4g固体物质,称量时,他将药品和砝码的位置放反了,则固体的实际质量为  

A5.4g           B4.6g        C5.6g            D5.2g

答案

B

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