【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
查看答案解析
参考答案：
正在加载...
答案解析
正在加载...
根据网考网移动考试中心的统计，该试题：
3%的考友选择了A选项
3%的考友选择了B选项
17%的考友选择了C选项
77%的考友选择了D选项
试题查看
参考答案： 
答案解析