问题 单项选择题 A1型题

引起流行性角结膜炎的病原体是()

A.腺病毒8,19,29

B.腺病毒3,4,7

C.70型肠道病毒

D.A24柯萨奇病毒

E.单纯疱疹病毒Ⅰ型

答案

参考答案:A

解析:流行性角结膜炎是常见的结膜炎类型,主要由腺病毒8、19、29和37(腺病毒D亚组)引起,腺病毒3、4、7引起咽结膜热,70型肠道病毒和A24柯萨奇病毒引起流行性出血性结膜炎,单纯疱疹病毒Ⅰ型引起单纯疱疹病毒性结膜炎。因此针对问题,正确的选项是A。

阅读理解

阅读理解。

     Let us say there is something you don't know how to do.

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providing free practical advice on these subjects and actually anything else you can think of.

     In one sense, these "how-to" sites represent a part of the growing world of online learning. This

tradition found one of its earliest forms in the FAQs - or Frequently Asked Questions files - that began

on Usenet, the Internet's global, discussion group. These FAQs, many of which still go round

continuously, took a specific subject - and explained it to complete novices.

     But "how-to" sites take the FAQs idea in a somewhat different direction by addressing subjects that

aren't necessarily related to discussion forums (论坛). These sites take the style of a written teaching

period and a tone of friendly advice. Possibly the biggest and best known of these sites is learn 2.com

(www.learn2.com). It offers nearly 1000 free tutorials (个别指导时间) and adds new ones frequently

for a job interview.

     At ehow.com (www.ehow.com) you can learn how to train for your first marathon, how to buy a

vacation home, or how to make a movie in eight steps.

1. The purpose of writing the passage is to ___________.

A. introduce new websites to people

B. teach how to take new courses by Internet

C. present new means to learn something you want to know

D. help you to solve any difficultly you meet with

2. "How-to" sites are set up to ___________.

A. explain FAQs to the public

B. help people to learn what they want to

C. tell their difference form discussion forums

D. complete the growing world of online-learning

3. The underlined word "novices" in the passage probably means ___________.

A. experts who know a lot

B. hosts of "how-to" sites

C. people without knowledge

D. beginners of "how-to" sites

4. It can be inferred (判断) from the passage that ___________.

A. "how-to" sites are specially designed for the disabled

B. people can teach themselves at home by visiting "how-to" sites

C. it is pleasant to listen to the advice on "how-to" sites

D. you can just click your mouse at home to question anything

5. According to the text, if you want to buy a tent for camping you may visit ___________.

A. www.ehow.com http://www. /

B. www. learn2.com

C. the discussion forums

D. the FAQs

填空题