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6 questions
平年每年有多少天?
28
29
365
366
閏年每年有多少天?
以下哪個月份是月大?
2月
4月
7月
9月
二月最多有多少天?
30
31
4月有多少天?
以下哪個月份是月小?
1月
3月
12月
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