问答题 喷粉机械中的风机有[填空(1)] 、[填空(2)] 两种，[填空(3)] 又可根据叶片的结构形式分为前弯式、后弯式、径向式。

问答题 An FI manager purchases a zero-coupon bond that has two years to maturity. The manager paid 100 for the bond. The current yield on a one-year bond of equal risk is 12 percent, and the one-year rate in one year is expected to be either 16.65 percent or 15.35 percent. Either rate is equally probable. If the manager buys a one-year option with an exercise price equal to the expected price of the bond in one year, what will be the exercise price of the option?

单项选择题 ( )是指在二维尺寸很小而第三维尺寸相对很大的缺陷，属于一维缺陷。 A、点缺陷 B、线缺陷 C、面缺陷