合影时，在一般情况下，第一排两端均为（）。A、司机 B、译员 C、宾方人员 D、主方

临床上儿童最常见的肾病综合征的病理类型是()

A.系膜毛细血管性肾小球肾炎

B.系膜增生性肾小球肾炎

C.膜性肾病

D.微小病变型肾病

E.新月体肾炎

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

有下列仪器：①烧杯；②蒸发皿；③圆底烧瓶；④试管；⑤坩埚；⑥锥形瓶．其中可以用酒精灯直接加热的仪器是（　　）

A．①②④⑤⑥

B．②④⑤

C．①③⑥

D．④⑥

行业因素包括定性因素和定量因素，常见的有( )。

A．行业或产业竞争结构

B．抗外部冲击的能力

C．经济剧期循环

D．行业估值水平

即使没有水分，金属也还会遭到腐蚀。