单项选择题

What has kept temperatures from rising at an even higher rate

A．The absorption of carbon dioxide by natural factors.
B．Human effort to reduce carbon dioxide emissions.
C．Drastically reduced emissions of greenhouse gases.
D．A 10% decrease in the average weight of polar bears.
<上一题 目录 下一题>
热门 试题

单项选择题
Which of the following is listed as being evidence for global warming
A．Water shortages in cities.
B．Earlier thawing of lakes and rivers.
C．Increased levels of greenhouse gases.
D．The rapid extinction of the polar bear.
单项选择题
Why did the fourth aspect mentioned by the author play a significant role in the lives of men in Ancient Greece and Rome
A．Because political success could depend on a man's appearance.
B．Because men had a sense of fashion.
C．Because grooming was particularly important in ancient societies.
D．Because jewelry was primarily the preserve of women.
相关试题