阿摩線上測驗
2. The professor's lecture on quantum mechanics was so ___ that only advanced researchers could fully grasp its complex theoretical implications.
(A) accessible
(B) candid
(C) esoteric
(D) impervious
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統計： A(1), B(0), C(7), D(1), E(0) #3854404
統計： A(1), B(0), C(7), D(1), E(0) #3854404
