A:1/3
B:1/8
C:1/4
D:1/2
某物质t℃溶解度为60g,则在该温度下40g饱和溶液中含该种溶质 ____ .
— There's somebody at the door. Who ____ it be? Is it the postman?—No. It ______ be him. It's just seven o'clock. It's too early.
2017年7月1日是下列哪个特别行政区成立20周年,是“一国两制”事业取得巨大成功的20年,并素有“购物天堂”之称的是( )