感觉sample question的出题风格和ASM上的考题风格差异很大，不知道考试的题目如何
Explain why the time-zero yield curve in the Vasicek and Cox-Ingersoll-Ross bond price models cannot be exogenously prescribed
这是官网上的考试范围，有哪位同学告诉我这句话如何解释，非常感谢！