MApiNfo格式电子地图的每个图层不包含以下哪种文件？（）
A.*.dAt
B.*.mAp
C.*.htm
D.*.id
参考答案：C
— Is your present pension sufficient to cover your cost of living?
— Enough and to spare. _____[ ]
A. I can't complain.
B. Serve me right!
C. I've had enough of it.
D. I can't be too particular.
墙体材料有（）
A.砖
B.砌块
C.砂
D.墙用板材
E.石子
