题目

        Suan: Oh, no! The door and the window______! Victor: Who could have done this? Suan: Go in quickly and see if we've lost anything. A.are breaking             B.have broken C.were broken            D.will break 答案：C某极地考察队从A点沿东北方向到达B地，到达之日发现B地刚好出现极昼现象，且已知这段时间太阳直射点向北移动，如图当日A地的正午太阳高度为（　　） A、6°B、22°C、37°26′D、13°