阿摩線上測驗
14.The carrying capacity of orbital space is not fixed; rather, it is ______ atmospheric conditions that regulate the removal of debris.
(A) substantiated by
(B) contingent upon
(C) contrary to
(D) plausible to
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統計： A(0), B(5), C(1), D(0), E(0) #3854331
統計： A(0), B(5), C(1), D(0), E(0) #3854331
