If the coupon payments are reinvested at the coupon rate during the life of the issue, then the:（）

A. yield to maturity is greater than the realized yield.

B. yield to maturity is less than the realized yield.

C. yield to maturity cannot be determined from the information given.

气相色谱法测定烷基汞中，检测时，可用两根不同极性的色谱柱分析，来确定色谱峰中有无干扰峰。