10. 當醫師要取病人的 cerebral-spinal fluid 時，針需穿過病人的腦膜(meninges)，其由外而內的順序為 (A)蛛網膜 (arachonoid), 硬腦膜(dura mater), 軟腦膜(pia mater), 蛛網膜下 (sub-arachonoid space) (B)硬腦膜 (dura mater), 蛛網膜下腔 (sub-arachonoid space ), 蛛網膜 (arachonoid) (C)硬腦膜 (dura mater), 蛛網膜 (arachonoid), 蛛網膜下腔 (sub-arachonoid space ) (D)軟腦膜 (pia mater), 蛛網膜 (arachonoid), 蛛網膜下腔(sub-arachonoid space )