水泥砂浆防水层的基层表面应(),并充分湿润无积水。
A.坚实
B.平整
C.粗糙
D.光洁
E.洁净
参考答案:A, B, C, E
A chart projection depicting the poles and a small area on either side of a connecting meridian,that is sometimes used for star charts,is the().
A.azimuthal gnomonic projection
B.Lambert conformal projection
C.transverse Mercator projection
D.polyconic projection
社会调查类型包括()。
A.现场调查
B.统计调查
C.文献调查
D.经验调查