57.X光之波長為何?
(A)100 μm~700 nm
(B)700 nm~400 nm
(C)400 nm~10 nm
(D)10 nm~0.01 pm
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統計: A(114), B(159), C(221), D(727), E(0) #2181751
統計: A(114), B(159), C(221), D(727), E(0) #2181751