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患者，男，89岁。心前区疼痛，据查有冠心病史，血压、血脂偏高，近日胸闷胸痛，痰少色灰，夜尿频多，腰痛，遇寒加重，舌淡，脉沉细。

首选行气药物是（）

A.肉桂

B.桂枝

C.附子

D.细辛

E.薤白

答案

参考答案：E

单项选择题

在病因推断中，反映关联强度的指标为（）

A.人群归因危险度

B.相对危险度

C.归因危险度

D.特异危险度

E.以上都不是
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单项选择题

A computer equipped with signature-recognition software, which restricts access to a computer to those people whose signatures are on file, identifies a person’s signature by analyzing not only the form of the signature but also such characteristics as pen pressure and signing speed. Even the most adept forgers cannot duplicate all of the characteristics the program analyzes.
Which of the following can be logically concluded from the passage above

A．The time it takes to record and analyze a signature makes the software impractical for everyday use.

B．Computers equipped with the software will soon be installed in most banks.

C．Nobody can gain access to a computer equipped with the software solely by virtue of skill at forging signatures.

D．Signature-recognition software has taken many years to develop and perfect.

E．(E) In many cases even authorized users are denied legitimate access to computers equipped with the software.
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