卫星来了，看你认识多少个？
看你能说出多少个？？？？？？？1.
http://upload.wikimedia.org/wikipedia/commons/2/2a/Moon_PIA00304.jpg
2.
http://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Io_highest_resolution_true_color.jpg/600px-Io_highest_resolution_true_color.jpg
3.
http://upload.wikimedia.org/wikipedia/commons/thumb/5/54/Europa-moon.jpg/600px-Europa-moon.jpg
4.
http://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Ganymede_g1_true.jpg/600px-Ganymede_g1_true.jpg
5.
http://upload.wikimedia.org/wikipedia/commons/e/e9/Callisto.jpg
6.
http://upload.wikimedia.org/wikipedia/commons/d/dd/Titan_Visible.jpg
7.
http://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Triton_moon_mosaic_Voyager_2_%28large%29.jpg/600px-Triton_moon_mosaic_Voyager_2_%28large%29.jpg
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