(2010年10月)资本主义简单再生产实现的条件下，第二部类产品的总价值应等于_______。
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(2012年4月)除了剩余价值与可变资本的比率外，剩余价值率还可以表示为剩余劳动时间与_______。
Which of the following is mentioned in the passage？
A. Public colleges increase the tuition higher than private ones do.
B. The students spent $ 2 000 on books and supplies ten years ago.
C. Graduates in liberal arts can earn $ 10 000 per year at present.
D. Both the students out-of-state and foreign students can obtain scholarships.
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