未知题型 First-things-first means we write the topic sentence at the beginning of a paragraph. Likewise, we write our thesis statement at the very beginning of an essay.

未知题型 电气化区段,不准用水冲洗各类机械与车辆。()

判断题 在清筛、更换道床及新线地段利用捣固车、配砟整形车等大型养路机械作业的线路条件应满足:静态轨距偏差不超过±6mm,静态三角坑偏差不大于30mm,轨缝不大于30mm,曲线目视圆顺、无反超高。()