在强心苷的化学结构中含羟基最少的药物是( )。
A.地高辛 B.洋地黄毒苷 C.毛花苷CD.毒毛花苷K E.以上都不是
参考答案:B
解析: 强心苷类药物一地高辛
指出高能X射线错误的吸收剂量校准深度()
A.钴-605cm
B.<10MV5cm
C.<10MV7cm
D.11MV-25MV7cm
E.26MV-50MV10cm
Positive attitudes can not only _______ one's confidence but also improve the quality of life. [ ]
A. speed up
B. build up
C. take up
D. sweep up