第19题: [单项选择]Argonne believes that people should regard maglev transportation as ______. A. safe, efficient high-speed trains B. the most exciting form of transportation for the future C. a kind of aircraft D. the most economical form of transportation 参考答案:C 答案解析:[注释] 根据第二句话“在磁悬浮列车成为商业化营运车辆之前,人们必须停止那种把它们看做高速火车的想法,而应把它们理解为低速飞行的飞机”。
第33题: [单项选择]Rather than ______ on a crowded bus, he always prefers ______ a bicycle. A. ride; ride B. riding; ride C. ride; to ride D. to ride; riding 参考答案:C 答案解析:[解析] 此题考查的是prefer to do...和rather than do...句型,用倒装句增加了干扰因素,若转换为陈述句就容易得出正确答案C。
第34题: [单项选择]失去结晶水称为玄明粉的是() A. 白矾 B. 芒硝 C. 两者都是 D. 两者都不是 参考答案:B