【单选题】Why not ______it right now? [ ]
【多选题】禁止在有毒有害物质超过规定标准的区域( )。
【多选题】禁止在有毒有害物质超过规定标准的区域( )。
【单选题】Why does the man say you waste time waiting around doing nothing?
A.
You may get to the airport too early.
B.
You may spend a lot of time travelling to the airport.
C.
You may wait for some time on the plane before taking off.
【多选题】禁止在有毒有害物质超过规定标准的区域( )。
【判断题】钢筋混凝土受弯构件,当 ζ = ζ b 时, M y = M u 。
【多选题】禁止在有毒有害物质超过规定标准的区域( )。
【单选题】Why does the author start doing excercise
B.
It is free for students.