【单选题】当采用钢筋混凝土构件时,要求混凝土强度等级不应低于()。
【单选题】当采用钢筋混凝土构件时,要求混凝土强度等级不宜低于()。
【简答题】当采用钢筋混凝土构件时,要求混凝土强度等级不应低于下列何值?( )
【多选题】What elements were added into Jeet Kune Do by Bruce Lee?
【简答题】德国浪漫主义歌剧的奠基人是(),他的歌剧代表作为《()》。
【单选题】当采用钢筋混凝土构件时,要求混凝土强度等级不应低于( )。
【单选题】What does Bruce Nagy ask Dr. Green to do?
A.
Provide a copy of his lecture notes
B.
Respond before the beginning of April
C.
Give a demonstration of his latest invention
D.
Leave time open for questions from the audience