◎ 题干
计算题
1. What percentage of area is shaded?

Answer: _                                                          .
2. If a group of 6 people have an average age of 21,  and each person is half the age of the next person,
    what are the ages of the 6 people?
Answer: _                                                           .
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“计算题1. What percentage of area is shaded?Answer: _. 2. If a group of 6 people have an average age of 21,and each person is half the age of the next person,…”主要考查了你对  【单词、词组】  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。