Warmblooded animals live an active life even in freezing winter, which helps them to________their normal body temperature.
[     ]
A. keep up  
B. build up
C. bring up  
D. pick up
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科目：高中英語 來源：同步題 題型：單選題

Warmblooded animals live an active life even in freezing winter，which helps them to________their normal body temperature.
[     ]
A．keep up 
B．build up
C．bring up  
D．pick up

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科目：高中英語 來源：陜西省同步題 題型：單選題

Warmblooded animals live an active life even in freezing winter, which helps them to________
their normal body temperature.
[     ]
A. keep up  
B. build up
C. bring up  
D. pick up

查看答案和解析>>

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