問題詳情

61.Scientists have developed a kind of bio-fuel (生質燃料) from the _______ such as corns.
(A) product
(B) current
(C) cereal
(D) grains

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)