A:迪亚士
B:达伽马
C:哥伦布
D:麦哲伦
—Tom, you never told me why you were late for school again,_____ you? —____. But maybe you forgot it, sir.
如图为甲、乙两物质(均不含结晶水)的溶解度曲线,下列说法正确的是( )