A:Not having received
B:Not to receive
C:Not received
D:Having not received
——_______ are you going back to London, Tony?——At the end of July.
A、B两种固体物质的溶解度曲线如图所示,据图回答下列问题:
(1)分别将相同质量的A、B饱和溶液,从30℃降到20℃,析出晶体较多的是 ____ (填“A”或“B”).
(2)30℃时,将20g物质A溶于50g水中,所得溶液中溶质的质量分数为____ .
著名画家徐悲鸿说过:“人不可有傲气,但不可无傲骨。”这句话告诉我们( )