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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:高中英语 来源:同步题 题型:单选题

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>>

科目:高中英语 来源:陕西省同步题 题型:单选题

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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