問題詳情

18. The satellite’s purpose is to find sources of air pollutants,including exhaust gas, carbon dioxide and carbon monoxide_____ from factories.
(A) emit
(B) emits
(C) emitted
(D) emitting

參考答案

答案：C
難度：適中0.601852
統計：A(14),B(21),C(130),D(40),E(0)

用户評論

【Sharon】評論

monoxide 一氧化碳

【Nebbia】評論

 emit  散發pollutant 汙染源exhaust 排出氣體