简述传染病的分类及法定报告时限？
参考答案：
传染病分为甲、乙、丙三类；甲类传染病2小时内报告，乙类、丙类24小时内报告。
Daniel is _____ his purse, but he can't _____ it. [ ]
A. looking for; find
B. seeing; look for
C. finding; look at
D. looking at; see
. ______ it rains when we can’t find a place to escape from the rain?
A．What if
B．How come
C．What about
D．How about
