One problem with this classification is that even classic homeotherms experience periods of reduced temperature.
这种
类的一个问题是,即使是典型的恒温动物也经历了降低体温的时期。
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D, the National Archives building in Washington D.C. To preserve the quality of the document, it is kept at 67 degrees Fahrenheit and 40 percent humidity, and you can say that fascinating fact constitutes our Constitution Day quiz.
答案是D,华盛顿的国家档案馆。为了保护这份文献的质量,它被保存在67华氏度、40%湿度的恒温恒湿环境中,这就是今天组成宪法日测试的有趣知识。