古罗马时期最杰出的穹顶实例是（） A.梅宋卡瑞神庙 B.罗马城的维奈尔和罗马神庙 C

城市经济学的核心理论是（）。

A.宏观的城市化

B.城市经济增长理论

C.微观的城市内部空间结构理论

D.城市公共经济理论

华塑公司2013年要确保实现PVC产量（）万吨的目标。

A.30

B.40

C.36

D.48

计算题：

2009年8月15日，甲公司股票价格为每股50元，以甲公司股票为标的的代号为甲49的看涨期权的收盘价格为每股5元，甲49表示此项看涨期权的行权价格为每股49元。截至2009年8月15日，看涨期权还有l99天到期。甲公司股票收益的波动率预计为每年30%，资本市场的无风险利率为年利率7%。

要求：

(1)使用布莱克.斯科尔斯模型计算该项期权的价值(dl和d2的计算结果取两位小数，其他结果取四位小数，一年按365天计算)。

(2)如果你是一位投资经理并相信布莱克.斯科尔斯模型计算出的期权价值的可靠性，简要说明如何作出投资决策。

（）用尽量简单的方式概括复杂的社会现象。

A、托勒密

B、伽利略

C、沈括

D、康德

"The top Democrat on the House Education Committee, Rep. George Miller of California" means that Mr. George Miller is ______.

A．from the State of California, a representative of his state at the House of Representatives, and a Republican Party member, and he sits on the Education Committee of the House of Representatives of the United States of America

B．a Republican representative from the State of California, a representative of the House of Representatives of the USA to the State of California, and the top Democrat on the Education Committee of the House of Representatives

C．a representative of the State of California to the House of Representatives of the United States of America, a member of the Democratic Party, and a member on the Education Committee of the House of Representatives

D．a top Democrat representing George Miller from the State of California, a Republican Party member at the House of Representatives, and a member of the Education Committee of the House of Representatives of the United States of America