问题描述:
how long is lunch break?看图回答 在线等
period1 9:00-9:55
period2 10:00-10:55
break
period3 11:10-12:05
period4 12:05-13:00
lunch
period1 9:00-9:55
period2 10:00-10:55
break
period3 11:10-12:05
period4 12:05-13:00
lunch
问题解答:
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