机械加压送风,余压值应符合()
A.前室、合用前室为10~20Pa
B.消防电梯间前室为30~40Pa
C.楼梯间为40~50Pa
D.避难层(间)为50~60Pa
参考答案:C
(2013·河北保定一中三模)—Jenny, it won't be long before I receive the admission letter from Oxford University.
—________
A.Good luck!
B.Congratulations!
C.Why so soon?
D.Don't worry.
定位