草图本
PC端上一款功能非常强大的绘图工具，通过它，你能够制作出专业水品的素描和绘画作品，其开发商为Autodesk，相信大家都知道这家公司的，举世闻名的AutoCAD就是这家公司的作品。现在，随着Android平台上系统与硬件的日益成熟，这家公司也为我们的Android系统开发了一款专业级别的移动设备绘图...
多年生草本植物
ねこ図鑑45選
Google play書籍&文献カテゴリ 人気(有料)6位、新着1位を獲得! AppStore 辞書・辞典カテゴリ 3位を獲得(3/30時点) 本アプリでは人気の猫45種をご紹介。原産国や体重・性格などの基本情報をはじめ、飼い方・かかりやすい病気・用語などについて詳しく解説しております。加えて、「わ...
Montford Point Marines free
The marines who trained at Montford Point were the first African-American Marines to be integrated into the military since the Revolutionary War. They...
Transcontinental Rail
America's First Transcontinental Railroad explores the significance of the building of the railroad across the entire United States. To complete t...
The Great Depression
The Great Depression focuses on the events leading up to this difficult period in American history. It also examines the lives of the people who were ...
Industrial Revolution
The Industrial Revolution examines why industry grew so quickly in America and what changes it created in the culture and economy of the nation. Innov...
Industrial Revolution free
The Industrial Revolution examines why industry grew so quickly in America and what changes it created in the culture and economy of the nation. Innov...
Underground Railroad free
The Underground Railroad will help you understand how the Underground Railroad really operated. Between 1830 and 1865 fugitive slaves followed a netwo...
An Early American Farm
An Early American Farm tells the true story of a young girl and her family who live on a farm in early America. The story tells how World War I, machi...
Underground Railroad
The Underground Railroad will help you understand how the Underground Railroad really operated. Between 1830 and 1865 fugitive slaves followed a netwo...