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问题 单项选择题

4岁男孩，无发绀，胸骨左缘2～4肋间闻及2／6级收缩期喷射音，P亢进呈固定分裂，胸骨左缘下可闻及舒张期杂音，未扪及震颤，心电图示P-R间期延长。诊断考虑()

A.室间隔缺损

B.房间隔缺损

C.动脉导管未闭

D.法洛四联征

E.生理性杂音

答案

参考答案：B

单项选择题

We need the clean shipped bills of（）in complete set issued to order and blank endorsed marked “freight paid”.

 

A．loading

B．lading

C．inspecting

D．packing
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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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