An investor notices that one Australian dollar is selling for $0. 67 in U. S. dollars. A put option with an exercise price of $0.75 is selling for $0.14. An investor takes a long position in a protective put. What is the value of the position at expiration and what is the profit if the price of one Australian dollar at expiration is $ 0.70 Value at expiratory Protective put profit（）①A. $ 0.75 -$ 0.06 ②B. $ 0.75 $ 0.08 ③C. $ 0.61 $ 0.08

A. ①

B. ②

C. ③

男，32岁。突然呼吸困难，右侧胸痛，查体：发绀，大汗。既往肺结核病史。

男，32岁。突然呼吸困难，右侧胸痛，查体：发绀，大汗。既往肺结核病史，为鉴别气胸与支气管哮喘，下列哪项检查有意义 （）

A.心电图

B.超声心动图

C.查找过敏原

D.胸部X线检查

E.血嗜酸性粒细胞计数