题目

If it 's possible to see red about not seeing red , that is what I was doing . We had misjudged the timing of our autumn trip to see the changing leaves in the Great Lakes states, and I was really upset .No matter how I strained my eyes (使劲用眼), I couldn't spot red anywhere . Not even a bit of golden yellow broke through the dull greenery. This vacation was a complete waste. I sat alone in the backseat of our rented car and got angry as we drove north through the dull, dark green. In the front seat my husband and father chatted merrily, obviously unconcerned. Then a motto came to mind: 下列关于经线的说法正确的是（　　）A．指示的方向是南北方向B．经线有360条C．所有的经线都是圆圈D．不同的经线长度不相等