18.
在家庭实验室中,小明把鸡蛋放入盛水的杯中,鸡蛋沉在杯底如图甲;向杯中加盐,鸡蛋悬浮如图乙;再加盐鸡蛋漂浮如图丙,三种情况下,各物理量间的关系正确的是(鸡蛋质量不变)( )
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| A. | 液体的密度ρ甲=ρ乙<ρ丙 | B. | 鸡蛋排开液体的质量m甲<m乙=m丙 | ||
| C. | 液体对容器底的压强p甲=p乙>p丙 | D. | 鸡蛋受到的浮力F甲<F乙<F丙 |