Book of Blood绘本PDF+音频百度网盘免费下载

适合年龄

9岁左右

绘本简介

Readers will learn that one drop of blood contains more than 5 million red blood cells, but they'll be amazed when they find out that if all the arteries, veins, and capillaries in the body were stretched end to end, they would reach across the United States 20,000 times! These and other facts about the circulatory system are included in the Book of Blood. Types of blood vessels, blood cells, and blood types are explained. Photographs, illustrations, and a diagram showing how blood is pumped through the heart help readers connect with the text.

读者会了解到，一滴血含有超过 500 万个红细胞，但当他们发现如果身体的所有动脉、静脉和毛细血管都被首尾相连时，他们会惊讶地发现 美国2万次! 这些和其他有关循环系统的事实都包含在《血之书》中。 解释了血管、血细胞和血型的类型。 显示血液如何通过心脏泵送的照片、插图和图表可帮助读者与文本建立联系。

RAZ有严密的分级体系：根据全文词汇数、高频词词汇数与比例、低频词词汇数与比例、句子长度、句子复杂度、句式、插图信息量、思想深度、主题等多个角度，将整个阅读体系分为aa，A-Z共27个级别。

RAZ旨在帮助孩子找到适合孩子水平的级别，通过在同一级别下的大量阅读逐步提高孩子的阅读能力。

RAZ按难度分为27个级别，AA—C这4个级别对应幼儿园阶段; D—J这7个级别对应美国小学一年级;K—P这6个级别对应美国小学二年级;Q—T这4个级别对应美国小学三年级;U—W这3个级别对应美国小学四年级;X—Z对应美国小学五六年级(相当于国内高中毕业)。