【单选题】The result has been a ________endless stream of synthetic insecticides……they differ sharply from the simpler prewar days.
【单选题】I wanted to major in English at first, but later I _____ my mind and now I am a writer.
【简答题】道岔表示器(之一)的显示方式为: (1)昼间无显示;夜间是紫色灯光——表示道岔位置通向_____向。 (2)昼间为中央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_____向。 道岔表示器(之二)的显示方式为:平时无显示。 (1)紫色灯光——表示道岔位置通向_____向。 (2)黄色灯光——表示道岔位置通向_____向。
【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。
【单选题】I am _____ to believe that she won't come back to see her husband again.
【单选题】_____ from media reports,the result has been unclear.
【单选题】_____ from the media reports, the result has been unclear. [ ]
【单选题】道岔表示器的显示:夜间为( ),表示道岔位置开通直向。