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【判断题】
鸟类具有较高的体温，约为37.0-44.6，古鸟类为变温动物
A.
正确
B.
错误
题目标签：变温动物
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【单选题】Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme(酶)systems of mammals and birds are most efficient only wi...
A.
body temperatures of various animals
B.
the newest research on measuring temperature
C.
methods of temperature reduction
D.
the classification of animals by temperature regulation
相关题目：
【单选题】Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme(酶)systems of mammals and birds are most efficient only wi...
A.
body temperatures of various animals
B.
the newest research on measuring temperature
C.
methods of temperature reduction
D.
the classification of animals by temperature regulation
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