對二叉樹進行后序遍歷和中序遍歷時，都依照左子樹在前右子樹在后的順序已知對某二又樹進行后序遍歷時，結點 M 是最后被訪問的結點，而對其進行中序遍歷時， M 是第一個被訪問的結點，那么該二叉樹的樹根結點為 M，且()
A、其左子樹和右子樹都必定為空C
暫無解析
Aliensareborrowedwordswhichhaveretainedtheiroriginalpronunciationandspelling.WhichofthefollowingwordscomesfromChinese?
Itisnotdecided________theconferencewillbeheld.
CollinsCOBUILDEnglishLanguageDictionary(1987)hassomeuniquefeaturessuchasdefinition,extracolumnand______.
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
_______isafactthatEnglishisbeingacceptedasaninternationallanguage.
