阿摩線上測驗
10. Please refer to the attached sextant figure, the part that marked 「C」is:
(A) Horizon glass
(B) Horizon shade glass
(C) Index mirror
(D) Index shade glasses
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統計： A(469), B(105), C(122), D(54), E(0) #2929013
統計： A(469), B(105), C(122), D(54), E(0) #2929013
