Travel has become part of our life. And more and more of us Travel has become part of our life. And more and more of us have come to know th 分类:制度与政策 题型:单选题 查看答案
桥面铺装的作用是保护和防止梁的行车道板不受车辆轮胎(或履带)的直接磨损和雨水的侵蚀;同时,可使车辆轮重的集中荷载起到一定 桥面铺装的作用是保护和防止梁的行车道板不受车辆轮胎(或履带)的直接磨损和雨水的侵蚀;同时,可使车辆轮重的集中荷载起到一定的分布作用。( ) 分类:制度与政策 题型:单选题 查看答案