·2,447,543篇论文数据，部分数据来源于NoteExpress
As a result, many companies now offer instructional programs for homeschooled children, including books, CD-Rom educational materials and Internet learning and testing.
其结果，很多公司为在家上学的孩子提供辅导项目，包括书本、CD盘教材以及因特网教学与测试。
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