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【多选题】
关于相的区分,下列说法正确的是( )。A.
对于气体混合体系,体系内不管有多少种气体,有一个相
B.
对于液体混合体系,根据溶解度,液体分为几层就有几个相
C.
对于固体混合体系,有一种固体是一个相,同一种物质以不同晶体共同存在,每种晶体自称一相
D.
对于气体混合体系,体系内有几种气体便是几个相
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