【单选题】In the atmosphere, carbon dioxide acts rather like a one-mirror--the glass in the roof of a green-house which allows the sun' s rays to enter but prs the heat from escaping. According to a weathe...
A.
pr the sun' s rays from reaching the earth' s suce
B.
mean a warming up in the Arctic
C.
account for great changes in the climate in the northern hemisphere
D.
raise the temperature of the earth' s suce