病人，女性，33岁，阴道接触性出血，初步诊断为“宫颈癌”。宫颈刮片多次检查为阳性，而宫颈活检为阴性，为确诊需做进一步检查 A. CTB. MRIC. 碘试验D. 宫颈锥切术E. 不做任何处理，1个月后再次活检

单项选择题在直线回归方程中,回归系数表示( )。 A. 当时,的平均值 B. 变动一个单位时,的变动总量 C. 变动一个单位时,的平均变动量 D. 变动一个单位时,的平均变动量

多项选择题In the interpretation of the following infrared spectroscopy of acetophenone, the listed assertions have been made. Select among them which are right. ( ) A、(3010- 3100) correspond to the vibration of OH stretching from the alcohol group B、(2950 -2720) correspond to the vibration of C-H stretching (strong) specific from the ketone. C、(1760-1625) correspond to the vibration of C=O bond stretching (strong) characteristic of ketone functional group. D、(1600-1500) correspond to the vibration of C=C bond (variable) stretching from the aromatic ring.