绘制管道施工平面图时,一般工程需绘制()几种平面图。
A.首层
B.标准层
C.地下室
D.设备层和顶层
参考答案:A, B, C, D
Cindy is a good student. She’s ________ the first to come to school. She ________ comes to school late.
A.often; always
B.never; sometimes
C.always; never
D.sometimes; usually