单项选择题

It can be inferred from the passage that ______.

A．there are 1,000 positions for the Ph. D. s
B．the high rate of dropouts is because the salary for dropouts is too high
C．the high rate of dropouts lies in the fact that the salary for Ph. D. is too low
D．the reason why so many Ph. D. candidates drop out is that academic requirement is too high for them

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单项选择题

We learn from the passage that ______.

A．foreign language requirements for the Ph. D. do not vary in difficulty among universities
B．meeting foreign language requirements for the Ph. D. is the most frequent reason for dropping out
C．it is an essential part of many Ph. D. programs to meet foreign language requirements for the Ph.D.
D．meeting foreign language requirements for the Ph. D. is more difficult for the science candidate than for the humanities candidate

单项选择题

After reading the passage, one would refrain from concluding that ______.

A．Ph. D. s are not earning what they deserve in nonacademic positions
B．colleges and universities employ a substantial number of Ph. D. dropouts
C．a Ph. D. dropout, by and large, does not have what it takes to learn the degree
D．optimism reigns in regard to getting Ph. D. dropouts to return to their pursuit of the degree