某施工企业当期主营业务成本600万元，期初存货为100万元，期末存货为300万元，则存货周转次数为（）次。
A．1.5
B．2
C．3
D．6
参考答案：C
I will go to the seaside for a holiday with my family as soon as I ______ what I am doing.
A．would finish
B．have finished
C．finishing
D．finish
附建式的全地下或半地下工程的防水设防高度，应高出室外地坪高程（）以上。
A.250mm
B.500mm
C.1000mm
D.1500mm
