推 strangehead:R是T的孫子... 02/26 15:20
→ gpu:我想久想不通...都忘了有孫子這東西 02/26 15:45
→ gpu:謝謝嚕 02/26 15:45
Which of the following statement(s) is(are) true ?
(c) If R is a subtree of S, and S is a subtree of T, then R is a subtree of T.
請問這個選項錯在哪裡?
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