单选题What is the main idea of the passage?AHuman activities are changing the climate.BDams make local meteorological conditions worse.CDams alter local weather and make themselves unsafe.DExtreme precipitation events around large dams have increased.
单选题
What is the main idea of the passage?
A
Human activities are changing the climate.
B
Dams make local meteorological conditions worse.
C
Dams alter local weather and make themselves unsafe.
D
Extreme precipitation events around large dams have increased.
参考解析
解析：
主旨大意题。纵观全文，文章主要阐述的内容是：大坝会改变周围地区的气候，导致更多的极端降水事件；此外，许多大坝修建的年限很长，这两个因素综合起来使得大坝自身不再安全，所以C“大坝改变当地气候并使它们自身不再安全”是较为完整的主旨概括。A作标题太宽泛，B、D概括得不全面，正确答案为C。
主旨大意题。纵观全文，文章主要阐述的内容是：大坝会改变周围地区的气候，导致更多的极端降水事件；此外，许多大坝修建的年限很长，这两个因素综合起来使得大坝自身不再安全，所以C“大坝改变当地气候并使它们自身不再安全”是较为完整的主旨概括。A作标题太宽泛，B、D概括得不全面，正确答案为C。
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