问题 单项选择题 A1型题

白喉的发病机制与病理改变,下列选项中正确的是()

A.白喉的病理改变局限于上呼吸道

B.白喉杆菌凭其侵袭力,使局部和周围组织坏死,形成急性假膜性炎症

C.渗出液富含易凝固的纤维蛋白,将炎症细胞、坏死黏膜组织和白喉杆菌凝固在一起,形成假膜

D.假膜质地致密,与黏膜下组织紧密粘连,不易拭去

E.假膜多见于鼻咽部,不会引起呼吸道阻塞

答案

参考答案:D

问答题
阅读理解

C

Wikipedia was founded as a branch of Nupedia, a now-abandoned project to produce a free encyclopedia (百科全书). Nupedia required highly qualified contributors, but the writing of articles was slow. During 2000, Jimmy Wales, founder of Nupedia, and Larry Sanger, whom Wales had employed to work on the project, discussed ways of supplementing (补充) Nupedia with a more open project. Multiple sources are suggested for the idea that a wiki might allow members of the public to contribute material, and Nupedia’s first wiki went online on January 10.

There was considerable resistance on the part of Nupedia’s editors and reviewers to the idea of associating Nupedia with a Web site in the wiki format(格式), so the new project was given the name “Wikipedia” and launched on its own domain (域名), wikipedia.com, on January 15. The domain was eventually changed to the present wikipedia.org when the not-for-profit Wikimedia Foundation was launched as its new parent organization. In March 2007, the word wiki became a newly-recognized English word.

In May 2001, a wave of non-English Wikipedias was launched — in Catalan, Chinese, Dutch, Esperanto, French, German, Hebrew, Italian, Japanese, Portuguese, Russian, Spanish, and Swedish. These were soon joined by Arabic and Hungarian. In September, Polish was added. At the end of the year, Afrikaans, Norwegian, and Serbocroatian versions were announced.

Anyone with Web access can edit Wikipedia, and this openness encourages inclusion of a great amount of content. About 75,000 editors — from expert scholars to casual readers — regularly edit Wikipedia, and these experienced editors often help to create a consistent style throughout the encyclopedia.

Editors are able to watch pages and techies(科技人员) can write editing programs to keep track of or correct bad edits. Where there’re disagreements on how to present facts, editors work together to arrive at an article that fairly represents current expert opinion on the subject. Although the Wikimedia Foundation owns the site, it’s largely uninvolved in writing and daily operations.

66. Jimmy Wales wanted a more open project because ______.

A. he wanted to found Wikipedia

B. Nupedia had its own disadvantages

C. he earned less money from Nupedia

D. Nupedia had been abandoned

67. The idea of connecting Nupedia with a Web site in the wiki format ______.

A. gained a wide support

B. came into being on January 15, 2000

C. made Nupedia better and better known to the public

D. weren’t welcomed by all Nupedia’s editors

68. Which of the following versions joined the Wikipedia in or after October 2001?

A. English version.                       B. Norwegian version.

C. Hebrew version.                       D. Arabic version.

69. Who are responsible to create the main style for the Wikipedia?

A. Any readers of the Wikipedia     B. The techies.

C. The Wikimedia Foundation.              D. The experienced editors.

70. Which of the following facts about Wikipedia most probably surprises readers?

A. Its owner contributes less to its writing.

B. It appeals to a wider audience.

C. Its owner was founded only recently.

D. It was evolved from Nupedia.