我国的社会救助主要有______。
A．失业救助
B．生育救助
C．自然灾害救助
D．城乡贫困户救助
E．城乡社会孤老病残救助
参考答案：C,D,E
Such a fierce dog __ that we had to wait outside before we could get into his yard．
A．has he had
B．did he have
C．he had
D．he has had
什么是期刊联合目录，编制的意义是什么？
