The objective of the World Health Organization (WHO) shall be the attainment by all peoples of the highest possible level of health.

马斯洛需要层次理论（Maslow’shierarchyofneeds）的顶点被称为（） A: A生理满足（Physiological satisfaction） B: B达到生存需要（Attainment of survival） C: C交往的需要（The need for association） D: D上述都不是

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 drops outD. about one-third of those who start Ph. D．work do not complete the work to earn the degree

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 drops outD. about one-third of those who start Ph.D. work do not complete the work to earn the degree