可以根据溶血作用分类的细菌是
A.副溶血性球菌B.脑膜炎球菌C.葡萄球菌D.链球菌E.肺炎球菌
参考答案:D
He and his wife are of the same _____; they both want their son to go to college.[ ]
A. soul
B. spirit
C. heart
D. mind
适形放疗要求各野到达靶区内P点的剂量率和照射时间的乘积之和为一常数,调整各野照射P点的时间的方法有()
A.一维物理楔形板
B.组织补偿器
C.剂量补偿器
D.独立准直器动态扫描
E.以上所有均可