樓主怎麽把“充要條件”此用錯了呢?你要說什麽呢?他說這是必要條件,不是充要條件。也就是說,這隻是必要條件,不是充分條件。t啊的邏
所有跟帖:
• 他的邏輯很正確。 -nightrider- ♂ (0 bytes) () 11/28/2014 postreply 22:11:02
• 他的邏輯很正確。 -nightrider- ♂ (0 bytes) () 11/28/2014 postreply 22:11:02
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