問題詳情
9 The major culprits from transportation sources are carbon monoxide (CO), nitrogen oxides (NO and NOx),volatile organic compounds, sulfur dioxide, and hydrocarbons. These molecules react with sunlight, heat,ammonia, moisture, and other compounds to form the noxious vapors, ground level ozone, and particles thatcomprise ______.
(A) population
(B) smog
(C) toxicities
(D) malaria
參考答案
答案：B
難度：困難0.333333
統計：A(1),B(1),C(1),D(0),E(0)