◎ 题干
Don’t use your cellphone — we are flying at ____ altitude of 10,000 meters and ____average speech is 678km/h.
A.an; theB.the; theC.the; anD.an; an
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Don’t use your cellphone — we are flying at ____ altitude of 10,000 meters and ____average speech is 678km/h.A.an; theB.the; theC.the; anD.an; an…”主要考查了你对  【不定冠词】【定冠词】【零冠词】  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。