安装在绕月飞行的嫦娥一号卫星上的激光高度计,在地面上的质量为

安装在绕月飞行的嫦娥一号卫星上的激光高度计,在地面上的质量为15.7kg,在绕月飞行的卫星上它的质量将          (选填:“变大”、“变小”或“不变”)。在用天平称量物体的质量时,应将物体放在天平的       盘里。

  

答案

不变,左  

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