题目

 —I would like to speak to Mr. Martin. —There’s nobody here by that name. —Sorry, I ______ the wrong number. A. should have dialed                 B. must dial  C. could have dialed                D. must have dialed 答案：D关于纬线的说法，错误的是A. 纬度越高，纬线越短B. 纬线指示东西方向C. 纬线是与经线垂直相交的整圆D. 任何一条纬线圈，都能把地球分为两个半球