(2015•湖州)下列四组物质中,会发生化学反应的是( )
A:铜和稀硫酸
B:铁和硫酸铜溶液
C:烧碱溶液和氯化钾溶液
D:氧化铜和水
—How about your English speech contest yesterday?—Quite well.But my heart was in my mouth before it.
3085 ____
90830 ____
70514 ____