专四专八考试

【单选题】 It can be concluded that a concentration of carbon dioxide in the atmosphere would______.
A．prevent the sun's rays from reaching the earth's surface
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 surface

网考网参考答案：D
网考网解析：
根据文章第一段，就可推知，大气中出现二氧化碳集中会使地球表面温度上升。 查看试题解析出处>>