A.上大,下小,中間平緩B.中間大,上、下降呈對(duì)稱C.上小,下大,中間平緩D.中間小,上、下高呈對(duì)稱
A.泥巖、砂巖、灰質(zhì)巖B.砂巖、泥巖、灰質(zhì)巖C.灰質(zhì)巖、砂巖、泥巖D.砂巖、灰質(zhì)巖、泥巖
A.小于B.等于C.大于D.小于等于