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问题 单项选择题

某年的3月份有5个星期二，4个星期三，那么这一年的5月20日是星期几？（）

A．星期二

B．星期三

C．星期四

D．星期五

答案

参考答案：B

解析：

3月份共有31天，31÷7=4…3，所以这一年的3月份有5个星期日，5个星期一，5个星期二，而星期三到星期六各有4个，且3月的最后一天是星期二。4月份有30天，再加上5月份的20天，共有50天，50÷7=7…1，所以5月20日应该是星期三。答案为B。

阅读理解

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问答题 案例分析题

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