有人上传了下来书籍，但网站屏蔽了链接【https://bbs.pinggu.org/thread-6288193-1-1.html】。

我还专门去提供书籍的网站上看了一下，人家说上述书籍只要不是用于商业目的，是可以自由下载和传播的，不懂为啥本网站要删除，不让我们下载？
现在提供链接，想下载的可以去下载。注意：要遵守其规定，不得用于商业目的。

Prealgebra 下载地址:
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Prealgebra-OP_rTlMU6Y.pdf

Elementary Algebra 下载地址:
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/ElementaryAlgebra-OP_EXAzWku.pdf


Intermediate Algebra ：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/IntermediateAlgebra-OP_8dbGMu6.pdf


College Algebra：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/CollegeAlgebra-OP_K1pMHLb.pdf


Algebra and Trigonometry：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/AlgebraAndTrigonometry-OP.pdf


Precalculus：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Precalculus-OP.pdf


Calculus 01：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/CalculusVolume1-OP_D5aX5TF.pdf


Calculus 02：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/CalculusVolume2-OP_esPpXTB.pdf


Calculus 03：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/CalculusVolume3-OP_n7Nj74c.pdf


Introductory Statistics ：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/IntroductoryStatistics-OP_LXn0jei.pdf


Introductory Business Statistics：
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/IntroductoryBusinessStatistics-OP_MxkHmqw.pdf