保险公司自取得经营保险业务许可证之日起( )内无正当理由未办理公司设立登记的,其经营保险业务许可证自动失效。
A.1个月
B.3个月
C.6个月
D.1年
参考答案:C
With three children_________school, the couple have to leave their hometown in the countryside and work in big cities throughout the year.
A.attending
B.to attending
C.attended
D.being attended
渗透变形一般分为()。
A.管涌
B.流土
C.接触管涌
D.渗透
E.接触冲刷