【单选题】One thing I am certain of is that hard work _______ good results.
【单选题】两容器中分别贮有两种双原子理想气体,已知它们的压强相同,体积也相同,则( )。
【单选题】_____he spoke at the meeting, ______excited he was.
【单选题】He spoke at the meeting _________ of his company .
【单选题】_______ he spoke at the meeting is true, but ______ he said isn’t interesting.
【单选题】That is the reason ____ he spoke at the meeting.
【多选题】关于Ig可变区的叙述,下列哪项是正确的?