第5题: [单项选择]Giant corporations ______ to dominate the United States economy in the late nineteenth century, grew steadily larger during the 1920%. A. (which began B. (in which began C. (they began D. (which they began 参考答案:A
第6题: [单项选择]电客车司机作业“十严禁”错误的是() A. 横越线路时,严禁跨越地沟,钻车底。上下列车站稳抓牢,严禁飞乘飞降 B. 穿越道岔区时,严禁脚踏尖轨与道岔转动部分 C. 严禁未取得《电客车司机驾驶证》的人员独立操作列车 D. 列车运行严格按照规章中规定的速度运行,严禁超速运行 参考答案:C