阿摩線上測驗
12. Multiple sclerosis is a result of
(A) an immune system attack on nerve fibers.
(B) the absence of myelin on nerve cells.
(C) having excess acetylcholine receptors.
(D) excess amounts of myelin on nerve cells.
(E) blocking the nodes on Ranvier.
答案：登入後查看
統計： A(1), B(0), C(0), D(0), E(0) #3388555
統計： A(1), B(0), C(0), D(0), E(0) #3388555
