这些访问码的价格通常在每门课程80美元到155美元之间不等，学生需要通过这些访问码才能在线使用麦格劳·希尔和培生等教育公司开发的系统。
The codes—which typically range in price from $80 to $155 per course—give students online access to systems developed by education companies like McGraw Hill and Pearson.
她告诉 BuzzFeed 新闻，她的大一化学课要求她使用麦格劳·希尔公司提供的 Connect 系统，学生可以在该系统中提交作业、参加考试并跟踪他们的成绩。
She told BuzzFeed News that her freshman chemistry class required her to use Connect, a system provided by McGraw Hill where students can submit homework, take exams and track their grades.
麦格劳·希尔公司没有对评论的请求给出回应，但其首席执行官戴维·莱文在8月份告诉《金融时报》：“在高等教育领域，印刷教材的时代已经结束。”
McGraw Hill didn't respond to a request for comment, but its CEO David Levin told the Financial Times in August that "in higher education, the era of the printed textbook is now over."
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