A.洞穴 B.人為洞穴 C.害堤動(dòng)物洞穴 D.朽木洞穴
A.經(jīng)濟(jì)B.安全C.發(fā)展D.主權(quán)
A.農(nóng)業(yè)社會(huì)B.經(jīng)濟(jì)主義C.科技社會(huì)D.社會(huì)主義