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.
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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.
单项选择题
According to the article, what is one of the results of rising temperatures at Hudson Bay
A．Polar bears have become extinct.
B．Polar bears have less of an appetite.
C．A reduced amount of time for polar bears to feed.
D．The changes are startling and unexpected.
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