单项选择题

Which of the following best states the main idea of the passage

A．Coldblooded animals can develop fevers.
B．There are benefits to developing fevers.
C．Fevers inhibit bacterial growth.
D．Lizards can develop fevers.
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单项选择题
This article concludes that_________ contribute to the remarkable long life of these peoples.
A．moderate diets
B．clean mountain air
C．daily hard work
D．all the above factors
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