◎ 题干
Besides being able to walk on for three days without drinking, camels can also live for a long time ______ small quantities of food. 
A.withB.onC.byD.without
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ Besides being able to walk on for three days without drinking, camels can also live for a long time ______ small quantities of food.A.withB.onC.byD.without…”主要考查了你对  【介词和介词短语】  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。