关于子宫性闭经,正确的是()
A.子宫无功能性内膜
B.基础体温试验呈单相型
C.孕激素试验阳性
D.雌激素试验阳性
E. * * 脱落细胞检查无周期性变化
参考答案:A
以球面顶点O为原点,球心C在O点右侧,则曲率半径r为正(正或负),球心C在O点左侧,则曲率半径r为()
She promised to come and help us, and _______________.
A.so did she
B.so she did
C.so she would
D.so would she