市场结构有哪四种类型() A.完全竞争、垄断竞争、寡头垄断、完全垄断 B.垄断竞争、

题型:单项选择题

问题:

市场结构有哪四种类型()

A.完全竞争、垄断竞争、寡头垄断、完全垄断

B.垄断竞争、寡头竞争、完全垄断、国家垄断

C.垄断竞争、寡头竞争、国家垄断、地方垄断

D.完全竞争、寡头竞争、国家垄断、地方垄断

考点:初级经济学初级经济学题库
题型:单项选择题

患者女,21岁,学生。因反复胸闷、气短为主诉就诊。患者在儿时常因感冒在当地医院就诊。病程中无发绀、咯血、纳差及水肿。

其手术适应证包括()(提示:医生建议患者行介入封堵术,术前评估该患者的适应证和禁忌证。)

A.左向右分流不合并需外科手术的心脏畸形的ASD

B.阻力性肺动脉高压

C.动力性肺动脉高压

D.无持续性右向左分流

E.临床有右心室容量负荷过重的表现,如右心室扩大

F.ASD最大伸展直径<40mm

题型:单项选择题

材料分析。

材料:

    墨西哥的首都墨西哥城市人口已达2000万,该城市环境污染十分严重,城内有13万家工厂和150万辆汽车,每天排放大量有害气体,使墨西哥城上空常常被黄色烟雾笼罩。据环境保护专家推算,每天呼吸这种空气就等于吸两包雪茄烟。

(1)墨西哥城属于________聚落。

(2)不同类型的聚落呈现出的景观有较大差异,其主要原因是_______。(填字母)

A.社会制度的差异B.建筑风格的差异C.劳动生产方式的差异D.风俗习惯的差异

(3)为解决人口增长过快带来的问题,人类必须有计划地生育,使人口的增长与________、________相协调,与________________发展相适应。

题型:单项选择题

十一届全国人大常委会第十七次会议于 2010 年 10 月 28 日表决通过了(中华人民共和国社会保险法)和修改后的(中华人民共和国村民委员会组织法),据此回答 28—29 题 28.修改后的村委会组织法明确规定.以暴力、威胁、欺编、贿赂、伪造选票、虚报选举票数等不正当手段当选村民委员会成员的,其当选无效;同时,法律还对村民选举委托投票等行为作了进一步规范.还进一步规范了村务公开等。这一修改      (   )

①体现了基层民主制度要与社会发展相适应

②有利于中国深入开展政治体制改革,推进民主政治进程

③有利于公民更好的行使选举权

④有利于推进我国基层 * * 建设

A.①

B.①②

C.①②③

D.①②③④

题型:单项选择题

Even at school there had been an unhealthy competition between George and Richard.

“I’ll be the first millionaire in Coleford!” Richard used to boast.

“And you’ll be sorry that you knew me,” George would reply “because I’ll surely be the best lawyer in our town!”

After graduation, George never became a lawyer and Richard was anybody but a millionaire …. Instead, it happened that both men opened bookshops on opposite sides of Coleford High Street, while it was hard to make much money from books then, which made the competition between them worse. Eventually, Richard closed down his, dreaming of making a fortune elsewhere. 

Now, with only one bookshop in the town, business was better for George. But sometimes he sat in his narrow old kitchen and gazed out of the dirty window, thinking about his former rival (竞争对手)。Perhaps he missed him?

George was very interested in old dictionaries, and he had recently found a collector in Australia who was selling a rare first edition. When the parcel arrived, the book was in perfect condition and George was quite delighted. But while he was having lunch, George glanced at the photo in the newspaper that the book had been wrapped in. He was astonished — the smiling face was older than he remembered but unmistakable! Trembling, George started reading: “Bookends Company has bought ten bookstores from its competitors. The company, owned by multi-millionaire Richard Pike, is now the largest bookseller in this country.”

小题1:George and Richard were        at school.

A.roommates

B.good friends

C.competitors

D.booksellers小题2:How did George feel about Richard after his disappearance?

A.He envied Richard’s good fortune very much.

B.He thought about Richard from time to time.

C.He felt unlucky with no more rival in the town.

D.He was unhappy of Richard’s disappearance.小题3:George got information about Richard from       .

A.a dictionary collector in Australia

B.one of Richard’s competitors

C.some rare edition of a dictionary

D.the wrapping paper of a book小题4:What happened to George and Richard in the end?

A.Both George and Richard became millionaires by selling books.

B.Both of them realized their original ambitions, which were the same.

C.George established a successful business while Richard was missing.

D.Richard became a millionaire while George had no great success.

题型:单项选择题

《农村低压电网剩余电流动作保护器配置导则》中“剩余电流动作保护器的配合原则”部分,规范了()的动作电流和动作时限的设置要求。

A、总保护器

B、中级保护器

C、户保

D、末级保护器

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