单项选择题

A．dropouts are substantially below Ph.D. s in financial……

Research has shown that ______.

A．dropouts are substantially below Ph.D. s in financial attainment
B．the incentive factor is a minor one in regard to pursuing Ph.D. studies
C．the Ph.D．candidate is likely to change his field of specialization if he
D．about one-third of those who start Ph.D．work do

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单项选择题The author states that many educators feel that ______.

A．steps should be taken to get the dropouts back to campus
B．the dropouts should return to a lower quality school to continue their study
C．the Ph.
D．holder is generally a better adjusted person than the dropoutD. the high dropouts rate is largely attributable to the lack of stimulation on the part of faculty members