烧一根不均匀的绳，从头烧到尾总共需要1个小时。现在有若干条材质相同的绳子，问如何用烧绳的方法来计时一个小时十五分钟呢？
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2024 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy
