(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.
In which of the following countries is the electronic observation most frequently used？
A. In Japan.
B. In Germany.
C. In America.
D. In France.
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