阿摩線上測驗
50. The passage probably continues with a discussion of
(A)the reasons craters are difficult to study
(B)the different shapes small craters can have
(C)some features of large craters
(D)some difference in the ways small and large craters were formed
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統計： A(1), B(2), C(7), D(9), E(0) #803699
統計： A(1), B(2), C(7), D(9), E(0) #803699
