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蛀虫蛀书的问题书架上摆着三本书,从左到右分别是Ⅰ、Ⅱ、Ⅲ卷。有一只蛀虫在里面啃书。每本书内页共厚2英寸,封面(包括封底)是1英寸厚。如果蛀虫从第1卷封面开始蛀,直到蛀穿第Ⅲ卷封底,蛀虫共蛀了多长? 注:因2004第7、8期是合刊,故该期题目答案及中奖名单将于下期公布,敬请关注。
There are three books on the bookshelf. From left to right, they are I, II, and III. There is a locust in it. The inner page of each book is 2 inches thick, and the cover (including the back cover) is 1 inch thick. If locusts start from the cover of the first volume, how long did the locusts last until the end of the third volume? Note: Since the 7th and 8th issues of 2004 are joint issues, the answers to the questions and the winning list will be announced in the next issue. ,stay tuned.