人们是怎么知道地球是圆的的？你也许会说是哥伦布航海发现的，但其实远在古希腊时期就有了地球是圆的的理论。 从船上的?t望台能看到在甲板上看不到的远方，月相变化，时差的产生，不同地方的人能看到不同的星空等等，这些都表明地球是圆的。 这本英语原版科普绘本提供了丰富有趣的知识，穿越历史，进入太空，启发孩子观察、思考有关地球形状的现象与知识，培养孩子独立思考的精神。 书后有简单的小实验，引导孩子自己动手、观察。
This Magic Tree House set including the followingtitles: Night of the Ninjas (Magic Tree House, No. 5) Afternoon on the Amazon (Magic Tree House, No. 6) Sunset of the Sabertooth (Magic Tree House, No. 7) Midnight on the Moon. (Magic Tree House, No. 8)
The Magic Tree House adventures continue in books 9—12. Morganthe magical librarian of Camelot challenges Jack and Annie todiscover the answers to four riddles as they travel under the seato the Wild West, the African plains, and the frozen Arctic. Ifthey succeed, they will become Master Librarians! Books in this setinclude:Dolphins at Daybreak (#9)Ghost Town at Sundown (#10) Lionsat Lunchtime (#11) Polar Bears past Bedtime (#12) Magic Tree HouseBooks #9—12.
B is for Binary, F is for Fibonacci, P is for Probability...even a small sample begins to give you the idea that this is a mathbook unlike any other. Ranging freely from exponents to light-yearsto numbers found in nature, this smorgasbord of math concepts andtrivia makes a perfect classroom companion or gift book for thebudding young mathematician at home. Even the most reluctant mathstudent will be drawn in by the author's trademark wit, MarissaMoss's quirky illustrations and funny captions, and the answersrevealed in W is for " When are we ever gonna use this stuff,anyway?" Download the G is for Googol Teacher's Guide(300K)
From the expert team behind "It's Perfectly Normal" and "It's So Amazing " comes a book for younger children about their bodies--a resource that parents, teachers, librarians, health care providers, and clergy can use with ease and confidence. Full color.
Steve Bloom is an internationally bestselling wildlifephotographer and the author of Thames Hudson's bestsellingpublication, Elephant!. Now he has produced what will surely be thechildren's book of the year, a stunning photographic look at thewonderful world of the elephant, accompanied by a fascinating andaccessible text.
![George and the Big Bang [Hardcover] 乔治和宇宙大爆炸(精装) ISBN 978144](http://img3m1.ddimg.cn/33/5/22914771-1_l.jpg)
