第14题: [单项选择]A series of lectures on radio engineering ______ scheduled. A. have been B. has been C. are D. had been 参考答案:B 答案解析:[解析] 以series of+名词(复数)作主语时,谓语的数与series保持一致。series单复数词形不变,以a series of作主语时,谓语动词用第三人称单数;以two series of
第15题: [单项选择]石油现货价格为35美元/桶,无风险利率为6%,按连续复利,原油贮藏成本为5%,持有原油库存便利收益为4%,那么1年期原油期货合约的价格为______。 A. 34.59元 B. 37.54元 C. 39.42元 D. 42.00元 参考答案:B 答案解析:[解析] r=0.06,s0=35,T=1,u=0.05,y=0.04 F0=35e(0.06+0.05-0.04)=37.