【单选题】Believe it or not, the number of indifferent (漠不关心的) passers-by ______ eighteen, and a large number of people ______ discussing the incident on the net. [ ]
【单选题】Excel 退出“全屏显示”按( )键。
【单选题】John Smith, a successful businessman, has a ______ car.
【简答题】The growth of motorcycle use has been especially large in ______.
【简答题】The professor has a large (collect) ______ of books.
【单选题】变流器在逆变状态时,控制角α必须在( )