A.kept in nonmetal containers B.discarded as soon as possible C.cleaned thoroughly for reuse D.kept in the paint locker
A.混合料中瀝青含量少B.混合料中瀝青含量大C.排水不暢使瀝青膜剝落形成自由瀝青向上遷移D.高溫氣候
A.農(nóng)業(yè)社會B.經(jīng)濟主義C.科技社會D.社會主義