“露”和“雾”都是空气中的水蒸汽在温度降低液化而成。[ ]
√
下列属于概率抽样的方法是（）
A.分层抽样
B.定额抽样
C.偶遇抽样
D.立意抽样
E.雪球抽样
It's time _________ breakfast. [ ]
A. for
B. having
C. have
D. to has
