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单选题
Which of the following is a TRUE statement?
A
Sound travels fastest through the hardest thing.
B
Sound travels at different speeds in different temperatures and in different media.
C
Sound travels fastest in hottest temperature.
D
Sound travels fastest in coldest temperature.
参考答案
参考解析
解析：
推断题。文章第四段第二句提到“It varies in other temperatures and in different media”，B项表述与之一致，为正确答案。选项A、C、D在文中都没有提及，因此排除。
推断题。文章第四段第二句提到“It varies in other temperatures and in different media”，B项表述与之一致，为正确答案。选项A、C、D在文中都没有提及，因此排除。
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