27. 下列那個硬腦竇(dural venous sinus)最靠近腦下垂體(pituitary gland)?
(A)直竇(straight sinus)
(B)上岩竇(superior petrosal sinus)
(C)海綿竇(carvenous sinus)
(D)下岩竇(inferio petrosal sinus)

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統計： A(2), B(0), C(3), D(0), E(0) #897199