血友病诊断的实验室指标为()
A.STGT及纠正试验结果
B.黏膜、关节出血
C.基因诊断
D.有家族史
E.Ⅷ因子活性促凝活性测定
参考答案:A, C, E
微生物学的发展简史可分为()、()、()、()现处于。
What is the duration of a floating rate bond that has six years remaining to maturity and has semi-annual coupon payments. Assume a flat-term structure of 6 percent. Which of the following is closest to the correct duration()
A. 0.500.
B. 6.000.
C. 12.000.