鉴别各型病毒性肝炎最可靠的依据是（）

A.发病季节

B.患者年龄

C.起病方式

D.临床症状

E.病原学或血清学检查结果

The structure of interest rates results from all the following EXCEPT:（）

A. viewing each bond coupon payment as a separate zero coupon bond.

B. viewing a bond’s cash flows as having maturities ranging from the next coupon payment to the final payment at maturity.

C. creating the yield curve by plotting term to maturity against the coupon rate.