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右图为A、B、C三种物质的溶解度曲线，请据图判断下列叙述中正确的是A.
t 1 ℃时，B物质的溶解度为40
B.
t 2 ℃时，三种物质的溶解度由大到小的顺序为：A﹥B﹥C
C.
要将C的不饱和溶液转化为饱和溶液可以采取降温的方法
D.
要使A从其热饱和溶液中析出，可采用冷却溶液法
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