True: 線段AB與線段CD平行, 線段CD與FE平行,DE會垂直, 線段A與線段B一樣長, 線段AC與線段BD平行, ∠A、C為直角,則AB與CD平行, False: 線段AB與DC垂直, ∠D不是直角, 線段BD與線段DC垂直, 線段AD與線段BC垂直, ∠A、F為直角,則AB與FE不平行,

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