氧气瓶中耍留有0.1-0.2MPA.的余气,()
A.便于抽验
B.便于检查
C.便于加气
D.防止气体倒灌
参考答案:A, D
—What kind of house would you like? ,
—I’d like __________with a garden in front of__________.
A.It, one
B.one, one
C.one, it
D.it, it
监理单位应当按照水利部的规定,取得《水利工程建设监理单位资质等级证书》,并在其资质等级许可的范围内承揽水利工程建设监理业务。