問題詳情
Earth’s average temperature is about 60 F. It is 40 naturally, because nearly a third of the sun’s warmingenergy is reflected back into space. The remaining energy is 41 by either the ground or the atmosphere. Greenhousegases, 42 they are generated by nature or humans, trap some of the heat and hold on to it, as glass does in agreenhouse. If the concentration of greenhouse gases in the atmosphere 43 increase, then more heat likely would beretained, and global temperatures would rise.
【題組】40
(A) formed
(B) neutralized
(C) regenerated
(D) regulated
參考答案
答案：D
難度：適中0.45
統計：A(4),B(2),C(3),D(9),E(0)