20 腦脊髓液(cerebrospinal fluid)存在於①第三腦室(third ventricle)②第四腦室(fourth ventricle)③ 側腦室(lateral ventricle)④大腦導水管(cerebral aqueduct)⑤室間孔(interventricular foramen)⑥ 上矢狀竇(superior sagittal sinus),其正常的流動順序為:
(A)①→⑤→②→④→③→⑥
(B)①→④→②→⑤→③→⑥
(C)③→④→①→⑤→②→⑥
(D)③→⑤→①→④→②→⑥

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統計: A(3), B(8), C(1), D(12), E(0) #2925753