题目内容:
Whatisthemainpurposeofthepassage? A.Tooutlinetheresearchfindingsonthebrainstructure.
B.Toexplorethegenderdifferencesofbrainstructure.
C.Todiscussthevariousfactorsthatcausebraindifferences.
D.Tosuggestnewareasinbrainresearch.
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答案解析: