The old couple were so_____in their chess that they didn't hear anybody knocking at the door.    [ ]

A. absorbed    

B. attracted    

C. drawn    

D. concentrated

以下关于各专业施工图的排列顺序说法错误的是（）。

A.基础图在前，详图在后

B.总体图在前，局部图在后

C.次要部分在前，主要部分在后

D.先施工的在前，后施工的在后