Medical education in the United States includes educational activities involved in the education and training of medical doctors (D.O. or M.D.), from 1.________ training through to continuing education of 2. _______ specialists.A typical outline of the medical education pathway is presented as medical school, 3. ________, residency, fellowship, and board certification; however, medicine is a 4. _______ profession with many options 5. _______. For example, some doctors work in pharmaceutical (制药的) research, 6. ________[音频]medicine (within a company), public health medicine (working for the 7. ________ health of a population in an area), or join the 8. ________ forces.
在本量利图中,保本点位置取决于()因素。
A. 固定成本
B. 单位变动成本
C. 销售量
D. 单位售价
E. 产品成本
压力角是从动件受力方向与( )之间的( )角,压力角越( ),机构的传力性越好。
A. 绝对速度,钝角,小
B. 绝对速度,锐角,大
C. 相对速度,锐角,小
D. 绝对速度,锐角,小
铰链四杆机构的传动角与压力角的关系是(),传动角越(),机构的传力性能越好。设计时就保证机构的传动角()许用传动角。
A. 互为补角,大,大于
B. 互为余角,小,小于
C. 互为余角,大,大于
D. 互为余角,大,小于