汉朝占据国家正统思想地位的是哪个思想流派？（）
A、阴阳家
B、道家
C、法家
D、儒家
参考答案：D
等比数列{an}中，a3=2，a8=64，那么它的公比q=______．
An investor purchases a 3-month put option on a stock with an exercise price of $35. The risk-flee rate is 4.5 percent. At expiration, the stock price is $33.50. The option's payoff is closest to:（）
A. $0.
B. $1.48.
C. $1.50.
