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Despite environmental benefits, critics still argue that alternate energy is prohibitively inefficient. New technologies are being developed in order to________ greater efficiency, but it is still considerately more expensive than traditional production methods.
(A) encompass
(B) impede
(C) disperse
(D) facilitate

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	4F Dory Chao 國三上 (2013/04/25) disperse KK [dɪˋspɝs] DJ [disˋpə:s] 1. 驅散, 解散; 疏散檢舉
	5F Dory Chao 國三上 (2013/04/25) facilitate KK [fəˋsɪlə͵tet] DJ [fəˋsiliteit] 1. 使容易檢舉
	6F 冰淇淋高三上 (2013/05/08) prohibitively (ad.)過度地 encompass 圍繞; 包圍 impede 妨礙, 阻礙; 阻止 disperse 驅散, 解散; 疏散 facilitate 使容易檢舉

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