下列能与维生素C呈现褪色反应的物质是( )
A:淀粉
B:吲哚酚试剂
C:碘液
D:双缩脲试剂
—The cost of food and clothing is going up nearly every day.
—Yes, the price of vegetables is much than before.
两架飞机,东西相距一万千米,同时从赤道起飞,以同样的速度、同样的高度一直向北飞行,其结果是( )