正解：All digital signals are carried by analog signals. All satell

来源: 炅龙于 2014-03-26 00:55:51 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

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回答: All digital signals are carried by analog signals. All satellite 由 bi-elliptic 于 2014-03-26 00:34:28

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• 正解个P, plane 的 P -al1- ♂ (0 bytes) () 03/26/2014 postreply 02:14:29