38. Multiple sclerosis (MS) is a disease in nervous system. What is harmed in it?
(A) OPCs
(B) Piezol
(C) Myelin
(D) Brain stem cells
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統計: A(20), B(2), C(34), D(7), E(0) #2689204
統計: A(20), B(2), C(34), D(7), E(0) #2689204