【单选题】The result has been a ________endless stream of synthetic insecticides……they differ sharply from the simpler prewar days.
【简答题】The result has been a ______ yet ______ move first towards plastic stoppers and, more recently, to ______ screw caps .
【单选题】─Could I use your computer? ─Sorry. I am _____ it. [ ]
【单选题】The result has been a ______ leap in productivity.
【简答题】道岔表示器的显示昼间为中央划有一条鱼尾形黑线的黄色鱼尾形牌;夜间为黄色灯光--表示道岔位置开通____。
【简答题】The result has been widespread layoffs and plant closures in industrial countries. 结果是许多工业国大规模地 解雇 工人和 关闭 工厂。
【简答题】Television has opened windows in everybody's life. Young men will never again go to war as they did in 1914. Millions of people now have seen the effects of a battle. And the result has been a general...