PVC生产中添加改性剂的目的是（）。
参考答案：克服PVC制品性能上固有的缺陷
You don't know __________________________.
A．how much cost this car
B．how much is this car cost
C．how much this car is worth
D．how much is this car worth
A 30-year, 12% bond that pays interest annually is discounted priced to yield 14%. However, interest payments will be invested at 12%. The realized compound yield on this bond must be:（）
A. between 12.0% and 14.0%.
B. 12.0%.
C. 14.0%.
