一封闭箱处于恒温环境中,箱内有两杯液体, A 杯为纯水, B 杯为蔗糖水溶液。静置足够长时间后,观察其变化,发现( )。
A.
A杯水减少, B 杯后不再变化
B.
B 杯水减少, A 杯后不再变化
C.
A 杯变成空杯, B 杯后并溢出
D.
B 杯,并剩有蔗糖晶体
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