【判断题】在食品加工中,也可以靠机械强烈振动来消除气泡。
【单选题】The large passenger jets have made the traffic problems at airports ______.
B.
worse than ever before
【单选题】The computer of the airports have helped people greatly. ______,more people travel by plane in China.
【判断题】当构件焊缝间隙很大时,为了方便焊接可以在接头间隙中填塞焊条头、铁块等杂物。