经行或经后两乳作胀,腰膝酸软,两目干涩,咽干口燥,五心烦热,舌红少苔,脉细数。其治疗最佳选方是()
A.二至丸
B.沙参麦冬汤
C.一贯煎
D.六味地黄丸
E.左归丸
参考答案:C
在CT的种类中,“将传统常规CT的二维采集数据发展为三维采样,然后自三维数据中再重建出二维断层图像”属于()
A.普通CT
B.螺旋CT
C.电子束CT
D.超高速CT
E.多层螺旋CT
Which of the following statements is true regarding the Student’s t-distribution, as the degrees of freedom become larger: ()
A. Confidence intervals based on the Student’s t-distribution become larger.
B. Sample sizes of the Student’s t-distribution become smaller.
C. The Student t-distribution approaches a standard normal distribution.