题干
如图是NaCl,MgSO4的溶解度曲线．下列说法正确的是（ ）
A：只有在t1℃时，NaCl和MgSO4的溶解度才相等
B：t2℃～t3℃，MgSO4的溶解度随温度升高而增大
C：MgSO4的饱和溶液在t1℃时，溶质质量分数最大
D：t2℃时的MgSO4饱和溶液降温至t1℃时，有晶体析出
答案(点此获取答案解析）
D
， 
, many people thought that the family was falling apart--- _______, they thought it was dying.
