阿摩線上測驗
13.The parallax measurement is used in a survey studies to tell how far away ____.
(A) is an object distant
(B) distant is an object
(C) an object is distant
(D) a distant object is
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統計： A(0), B(4), C(9), D(15), E(0) #1288558
統計： A(0), B(4), C(9), D(15), E(0) #1288558