— A homeless man found treasure in the mountain. He became rich over night.
—_______.
A:Every dog has its day
B:The early bird catches the worm
C:Many hands make light work
D:Actions speak louder than words
猫头鹰和老鼠的关系属于 ( )
选项
实验目的
实验方案
A
鉴别氯化铵和尿素
分别加热熟石灰粉末研磨,闻气味
B
鉴别硝酸铵和氯化钠
分别加适量水,用手触摸容器壁
C
鉴别硫酸铜溶液和稀盐酸
分别观察溶液颜色
D
鉴别烧碱溶液和石灰水
分别滴加酚酞试液,观察颜色变化
结合上述材料,运用所学知识,思考下列问题。