车体为非长方体的货车，如罐车、漏斗车等只涂打（）标记。
A.车体内侧面高
B.车体内宽
C.车体内长
D.容积
参考答案：D
_______ you have been to America for many times, you must know something about this country. [ ]
A. Since
B. Although
C. Unless
D. When
舵叶上装有可拆舵柱通过的焊接管，管的上下端均装有（）
A.压盖、挡板
B.水密填料和垫料舵栓
C.舵杆衬套
D.铁梨木或青铜铀承
