問題詳情

5. Some countries have tired to jump-start the market of heat pumps by_________.
(A)upgrading the equipment
(B)encouraging investments
(C) implementing high-tech
(D) providing subsidies

參考答案

答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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