甲、乙两种固体的溶解度曲线如图所示.
(1)____ ℃时,甲、乙饱和溶液溶质质量分数相等.
(2)乙中混有少量甲时,可以用____ 的方法提纯乙.
(3)40℃时,甲溶液的溶质质最分数____ (填“一定”或“不一定”)大于乙溶液的溶质质量分数.
点P(m+3,m+1)在x轴上,则点P坐标为( )
—Too much homework has made me tired these days, Mr. Wang.
—That's true. But a small tree won't grow into a big tree it experiences lots of winds and rains.
向别人介绍你的朋友时,说: