阿摩線上測驗
8. Please refer to the attached sextant figure, the part marked by「D」is?
(A) Horizon glass
(B) Horizon shade glass
(C) Index mirror
(D) Index shade glasses
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統計： A(46), B(421), C(50), D(75), E(0) #3209673
統計： A(46), B(421), C(50), D(75), E(0) #3209673
