45.下列何種中子之能量最低?
(A)熱中子(thermal neutron)
(B)超熱中子(epithermal neutron)
(C)中速中子(intermediate neutron)
(D)快中子(fast neutron)
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統計: A(950), B(112), C(47), D(152), E(0) #966282
統計: A(950), B(112), C(47), D(152), E(0) #966282