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问题 单项选择题

关于流行性出血热的发病机制，下列哪项是错误的()

A．引起血管损害的可能机制是病毒损害血管壁及免疫作用

B．早期休克的主要原因是血浆外渗

C．早期出血的主要原因是血管壁脆性增加及血小板减少

D．低血压休克期血小板减少的最主要原因是由于修复受损小血管而消耗

E．肾功能不全、少尿的主要原因是肾小球滤过率下降

答案

参考答案：B

单项选择题

引出Chaddock征提示

A．皮质脑干束损害

B．脊髓丘脑束损害

C．锥体束损害

D．薄束损害

E．楔束损害
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单项选择题

Which of the following statements regarding the seller of a call and a put is TRUE A call writer:()

A. expects the price of the underlying stock to increase above the strike price and a put Writer expects the price of the underlying stock to decrease below the strike price. 

B. and a put writer both expect the price of the underlying stock to decrease below the strike price. 

C. expects the price of the underlying stock to decrease below the strike price and a put writer expects the price of the underlying stock to increase above the strike price.
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