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问题 选择题

小明动手模仿古人钻燧取火，那么谁最早掌握他所模仿的技术[ ]

A．元谋人        

B．山顶洞人      

C．半坡聚落    

D．北京人

答案

答案：B

单项选择题

An analyst does research about a company's earnings and gathers the following information about the company:
·Earnings per share is $1.20
·Price-to-earnings ratio is 17
·Book value per share is $16
·Market value per share is $18

All else being equal, if the company funds a share repurchase using debt with an after-tax cost of 6.5%, the company's EPS will most likely:A. decrease.
B. remain the same.
C. increase.
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单项选择题

关于勃起功能障碍分类的描述正确的是

A．分心理性和器质性两大类
B．分心理性、器质性和药物性三大类
C．分心理性、器质性和血管性三大类
D．分器质性和非器质性两大类
E．分心理性、器质性和混合性三大类
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