题目

小轿车前的挡风玻璃不竖直安装的主要原因是（  ）A、避免噪音          B、尽可能避免因平面镜成像造成不安全因素      C、为了造型美观      D、防止挡风玻璃震碎  答案：B解析:略 I like travelling by train, it is not as fast as by plane.A. until B. unless C. though D. because