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上海“世界博览会”某展厅志愿者的年龄分布如图,这些志愿者年龄的众数是( ) A....
上海“世界博览会”某展厅志愿者的年龄分布如图,这些志愿者年龄的众数是( )
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A.19岁
B.20岁
C.21岁
D.22岁
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如图,在正方形ABCD的外侧,作等边三角形ADE,连接BE,则∠AEB的度数为( )
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