第3题: [单项选择]Which of the following best describes the author's attitude toward the increasing amount of carbon dioxide in the atmosphere and its consequences A. Objective yet concerned. B. Angry yet resigned. C. Completely detached. D. Incredulous. 参考答案:A 答案解析:本文作者用数字计算客观陈述了二氧化碳的现状,从第二段Today,however, the potential problem is too much carbon dioxide等处可以看出作者对其增