阿摩線上測驗
40. Why had the previous ocean wave energy conversion efforts failed?
(A) Because they all relied on buoys.
(B) Because they were vulnerable to corrosion.
(C) Because they were not modified for marine use.
(D) Because they were not tethered to the sea floor.
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統計： A(156), B(658), C(349), D(196), E(0) #3158013
統計： A(156), B(658), C(349), D(196), E(0) #3158013
