第1题: [单项选择]线路横断面图的纵横比例尺的关系是（）。 A. 横比例尺大于纵比例尺 B. 纵横比例尺相等 C. 横比例尺小于纵比例尺 D. 都可以 参考答案:B 答案解析:线路纵断面图的比例尺，为了明显表示地形起伏状态，通常使高程比例尺为水平比例尺的10～20倍；而绘制横断面图时，其纵横比例尺要相同，一般采用1：100或1：200比例尺。故选B。
第6题: [单项选择]The children who were selected for the experiment gained more IQ points than the others because they were ______. A. more clever B. taught by different teachers C. taught with new materials and methods D. given more encouragement by their teachers 参考答案:D 答案解析:推理题。根据文中“Teachers…had given them more positive reinforcement．”(教师给了他们更多的正面帮助。) positive reinforcemen
