725. The research team invented some _____ devices to help people to save energy in the daily life.
(A) ingenious
(B) reluctant
(C) trivial
(D) stubborn

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統計： A(59), B(13), C(20), D(6), E(0) #1592935

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（A)ingenious精巧的

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    【答案】 A. ingeniou...
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