题目

下列现象中不能证明地球是个球体的是(   ) A、“沧海桑田”的变化      B、麦哲伦船队的环球航行 C、在海边看到帆船从远方驶来,总是先看到桅杆,再看到船身 D、人造卫星拍摄的地球照片 答案:A _____the Internet is of great help, I don’t think it’s a good idea to spend too much time on        it.          A. If                                       B. While                               C. Because                D. As
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