单项选择题
A.dealloc release dealloc B.dealloc release release C.dealloc dealloc dealloc D.release release Release
A.1 B.3 C.4 D.5
A.①②④⑤⑥ B.①②③④⑥ C.①②③⑤⑥⑦ D.①②③④⑤⑥⑦