◎ 题干
Warm­blooded animals live an active life even in freezing winter,which helps them to ________ their normal body temperature.
A.keep upB.build upC.bring upD.pick up
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Warm­blooded animals live an active life even in freezing winter,which helps them to ________ their normal body temperature.A.keep upB.build upC.bring upD…”主要考查了你对  【动词短语】【动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。