A. with his powerful middle-period works B. when his first three piano concertos were finished C. around 1802 D. around 1795 参考答案:A 答案解析:[听力原文]18-20 Beethoven was born in 1770. He studied first with his father. At 12 he had some m
第22题: [单项选择]某交易者买入执行价格为3200美元/吨的铜期货看涨期权,当标的铜期货价格为3100美元/吨时,则该期权是()。 A. 平值期权 B. 虚值期权 C. 看跌期权 D. 实值期权 参考答案:B 答案解析:期权的行使价非常接近标的资产的市价,称为平值期权。当看涨期权的执行价格(3200美元/吨)高于当时的标的物价格(3100美元/吨)时,该期权为虚值期权。看跌期权是指期权的购买者拥有在期权合约有效期内按