十二脂肠溃疡病人近几天剧烈呕吐，呕吐物中有宿食酸臭味，查血清钾2．3mmol／L，血

春节联合会上，有一名节目主持人出场时，“闻其声，而知其人”，张华能够清楚地辨别出这是著名主持人朱军的声音，这是他应用了声音的哪种性质？（　　）

A．音调

B．响度

C．音色

D．振幅

某乡人民政府土地员批准村民吴某建房四间，当吴某划线动工时，王某发现吴占用了自己使用多年的宅基地。对此王某核实了批准文件后不服，应向下列选项中的哪一个部门申请复议

A．乡政府

B．县政府

C．县政府土地管理局

D．县政府城建局

阅读文章后，从第50至53题所给A、B、C、D四个选项中，选出最佳答案。

For the first 10 years after the Wright brothers' original flight in 1903, flying was only a sport．It was a pastime for daredevils （不怕死的人）．One very determined daredevil was Bessie Coleman．She was the first black woman to fly an airplane．

Coleman, born in Texas in 1892, the tenth of 13 children, dreamed of becoming a pilot．To earn money for flying lessons, she washed other people's laundry．At the age of 19 she took a train to Chicago, where she began to study in a beauty school．For five years she worked in a barbershop, and then she looked for a flying school．There were none in the United States that would teach women, but Coleman heard that there were schools in France that would．So she studied the language and sailed off to France．

When she returned to the United States in 1921, Coleman was the first licensed black woman pilot．Her "aerial acrobatic （航空特技）exhibitions" impressed audiences．She took her airplane through loop-the-loops and flew upside down．She did slow rolls and sharp rolls．Audiences were amazed when she performed a move called "falling leaf．"

Coleman became a famous person．She performed her acrobatic flights all over the country．She also spoke to African-American audiences in schools, churches, and theatres．Fly, she told them．Be a part of the new aviation（航空） industry．Many young African-American men listened to her．Some became honored military pilots during World War II．Many others made their careers in aviation．

On April 29, 1926, Coleman was flying when a tool carelessly left in the airplane hit the control stick．The plane went into a dive and did not recover．The daring 34-year-old pilot was killed．

小题1:Bessie Coleman went to France to ____．

A．work in a barbershop

B．study the language

C．look for a flying school

D．take flying lessons小题2:Which of the following is probably an "aerial acrobatic"?

A．Flying upside down．

B．Speaking to audiences．

C．Getting a pilot's licence．

D．Impressing audiences．小题3:The underlined word "exhibition" in paragraph 3 means _____．

A．a holding back

B．a public show

C．falling leaf

D．loop-the-loops小题4:What would be the best title for the passage?

A．An early daredevil

B．The first flying woman

C．A pioneer in aviation

D．The first licensed black pilot

下列心动过速哪项是绝对不规则的（）

A.心房扑动

B.室性心动过速

C.窦性心动过速

D.心房颤动

E.交界性心动过速