◎ 题干
Compasses are not often used in our maths class. However, _____ is often used.
A. a compass
B. a pair of compass
C. a pair of compasses 
D. compass
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Compasses are not often used in our maths class. However, _____ is often used. [ ]A. a compassB. a pair of compass C. a pair of compasses D. compass…”主要考查了你对  【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。