1.10倍目鏡的視野值通常為多少毫米?
(A)1
(B)2
(C)10
(D)20
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統計: A(193), B(173), C(377), D(1163), E(0) #2744701
統計: A(193), B(173), C(377), D(1163), E(0) #2744701