用托盘天平测量物体的质量,测量过程中向右移动游码的作用相当于

用托盘天平测量物体的质量,测量过程中向右移动游码的作用相当于(  

A.往右盘增加砝码      B.从右盘减少砝码

C.向左调节平衡螺母    D.向右调节平衡螺母

答案

【答案】A

【解析】用天平称量物质时,左盘放物体,右盘放砝码,物质的质量=砝码的质量+游码的质量,故向右移动游码,相当于向右盘增加砝码,A正确,BCD错误。

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