1、选择题  如图所示的图形最终被确定为中国月球探测工程形象际志，它以中国书法的笔触，抽象地勾勒出一轮明月，一双脚印踏在其上，象征着月球探测的终极梦想，一位敢于思考的同学，为探月宇航员设计了测量月球第一宇宙速度的方法：在月球表面以初速度v0竖直上抛一个物体，若物体只受该月球引力作用，忽略其他力的影响，物体上升的最大高度为h，已知该月球的直径为d，如果在月球上发射一颗绕它运行的卫星，则发射速度至少应为（　　）
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