谁轻谁重/Mighty Maddie

出版时间：2004-9  出版社：Harpercollins Childrens Books  作者：MATHSTART  
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内容概要

Maddie's room is a mess. Maddie's toys are everywhere. And Maddie has to clean them up before her birthday party starts. This looks like a job for ... MIGHTY MADDIE! Faster than a speeding bullet, more powerful than a vacuum cleaner, Mighty Maddie, the room-cleaning superhero, gives readers a playful lesson about the difference between light and heavy.