A.帶狀切屑 B.擠裂切屑 C.單元切屑 D.崩碎切屑
A.社會(huì)主義B.農(nóng)業(yè)社會(huì)C.科技社會(huì)D.經(jīng)濟(jì)社會(huì)
A.經(jīng)濟(jì)B.安全C.發(fā)展D.主權(quán)