38 下列何種射束的 RBE (relative biological effectiveness) 值最高?
(A)22 MV X-ray
(B)Co-60
(C)Fast neutron
(D)Therapeutic proton
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統計: A(7), B(11), C(29), D(12), E(0) #2361213
統計: A(7), B(11), C(29), D(12), E(0) #2361213