敷设在市区、居民区或将来有可能被挖开地区直埋式电缆,均应在电缆上面覆细土或砂(),铺以红砖保护。
A.20cm
B.15cm
C.25cm
D.30cm
参考答案:A
——It is said that another new car factory_____now.
—— Yeah.It _____one and a half years.
A.is building; takes
B.is being built; will take
C.is built; will take
D.is being built; takes
薄形硬木地板的混凝土基层处理,一般应采用______做法。
A.老粉腻子批嵌
B.水泥加107胶批嵌
C.水泥砂浆抹平
D.凿毛后再用水泥砂浆抹平