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  3. According to the passage, which of the following is increasingly dangerous to sea creatures? According to the passage, natural

According to the passage, which of the following is increasingly dangerous to sea creatures? According to the passage, natural

admin2012-09-10  63
问题 According to the passage, which of the following is increasingly dangerous to sea creatures?
According to the passage, natural sounds include all of the following EXCEPT
选项 A、sounds made by animals themselves.
B、ocean drilling.
C、underwater earthquakes.
D、the breaking of ice fields.
答案B
解析
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