◎ 题干
He is so skillful that he can draw a picture at an object in      a human hair.
A.one-twentieth the thicker thanB.one-twentieth the thick of
C.one-twentieth the thickness ofD.one-twenty thicker than
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“He is so skillful that he can draw a picture at an object ina human hair.A.one-twentieth the thicker thanB.one-twentieth the thick ofC.one-twentieth the thickne…”主要考查了你对  【序数词】【小数】【分数】【量词】  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。