小张聪明好学,理论考试和田间作业考试成绩都不错。今天是他取得驾驶证的最后一个考试项目——路考。他高高兴兴地开着拖拉机来到指定的考场,监考员一看就皱起了眉头,原来他的车没有喇叭,前车灯也不亮,他被取消了考试资格。大家都知道,拖拉机的服务对象、作业环境比汽车复杂,技术要求高。而一些参加农田作业的轮式拖拉机往往忽视这一点,因而维护保养不 Zhang clever studious, theoretical exams and fieldwork test scores are good. Today is his last pass to obtain a driver’s license exam - Road test. He happily drove a tractor to the designated examination room, frowned upon by a scout who turned out that his car did not have a horn, and that the headlamps did not shine. He was disqualified from the examination. As we all know, tractors service objects, operating environment than the car complex, high technical requirements. While some wheeled tractors that participate in farmland operations tend to ignore this, maintenance does not