问题 单项选择题 A1/A2型题

诊断窦性心动过缓必须具备的心电图指标,以下不正确的是()

A.心率<60次/分

B.P波在aVR倒置

C.P波在Ⅱ、aVF直立

D.QRS波群间期≤0.11秒

E.P-R间期≥0.12秒

答案

参考答案:D

解析:成人窦性心律的频率低于60次/分,称为窦性心动过缓,心电图显示窦性P波,P波速率低于每分钟60次,P-R间期大于0.12秒。窦性P波要求P波在Ⅱ、aVF直立,在aVR倒置。

单项选择题
阅读理解

As we all know,it was Thomas Jefferson who wrote the Declaration of Independence (独立宣言).He wrote it in two weeks,and after a few changes,it was accepted by the Congress.As a result,he became famous in America's history.

Born in Virginia,Thomas Jefferson,a brilliant student at school and almost talented lawyer later,was much interested in politics.

Jefferson was elected Governor of Virginia in 1779,and he was sent to France as the Representative of the American Government in 1784.Sixteen years later,at the age of 57,he was elected president after Washington and Adams.

Far from a handsome man,he was is tall with long arms and big hands.Jefferson,who was an amusing talker in conversation,but a poor speaker,was generally good-natured.

Jefferson was regarded as a defender(捍卫者)of freedom Of America.As a president,he protected the right of speech.Interestingly enough,in his eight years as president,:Jefferson never said “No” to a bill(议案)which the Congress had passed.He did a lot in organizing the new University of Virginia.

Thomas Jefferson died on July the fourth,1826,the fiftieth anniversary of America’s independence.  

小题1:

We are most likely to read this passage in            .

A.a daily newspaper

B.a popular advertisement

C.a hi story book

D.an important notice小题2:

Which of the following statements about Jefferson’s personality is true?

A.He was a shy and slow learner when he was at school.

B.He was not an easy person to get along with at all

C.He was not only very talented but also very handsome.

D.He was an amusing talker,but not good at speaking in public.小题3:

Jefferson’s greatest contribution in America’history is that              .

A.he was for the right of free speech

B.he was sent to France as the Representative

C. he wrote the Declaration of Independence

D.he organized the new University of Virginia小题4:

Thomas Jefferson was elected president of the United States in the year of         .

A.1779

B.1784

C.1800

D.1826