已知小球A能在水中漂浮,小球B能在水中下沉,小球C能飘浮在水面上速进!
已知小球A能在水中漂浮,小球B能在水中下沉,小球C能飘浮在水面上,现在将三个小球放在一个金属小盒子里,漂浮在水面上.则下列说法正确的是:
A.把小球A、B从小盒中拿出来放入水里,容器里的水面高度不变
B.···B、C······················
C.···A、C······················
D.···A、B、C······················
选哪个,为什么?
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