问题 单项选择题 A1型题

对诊断尪痹最有意义的实验室检查是()。

A.血沉

B.类风湿因子

C.补体C3

D.抗核抗体

E.肾功能

答案

参考答案:B

解析:血沉无特异性。类风湿因子见于约70%尪痹患者血清中。抗核抗体及补体C3降低有助于系统性红斑狼疮的诊断。肾功能异常无特异性,只能说明有肾脏损害。

阅读理解与欣赏

阅读下文,完成1~4题。     

李时珍与《本草纲目》

  ①我国明朝的李时珍( 1518-1593),是世界上伟大的药学家。他的名著《本草纲目》,记载药物1 892种,附方11 096则,先后被译成英、法、俄、德、日、拉丁等10余种文字,成为国际一致推崇和引用的主要药典。这部巨著不仅对医药,而且对生物、矿物和化学也作出了重要贡献,李时珍的学术见解是高超的,他的分类方法很符合现代的科学原则。该书于1596年问世,比瑞典植物学家林奈的《自然系统》要早一个多世纪。     

  ②李时珍所以能取得如此巨大的成就,固然由于他批判地总结了前人的成果,“搜罗百氏”,旁征博引,参考八百余家;更主要的,还在于他忠心为百姓服务的精神。他认识到这项工作对百姓有利,因而用了近30年的时间,三次改写,才最后成书。在写作过程中,他不辞辛苦,深入实际,“访采四方”,先后到河南、江西、江苏、安徽等地,收集标本与药材。他治学态度严谨,一丝不苟。例如,为了证实前人所说“穿山甲诱蚁而食”,便亲自动手,解剖穿山甲,结论是:“腹内脏腑俱全,而胃独大,常吐舌,诱蚁食之,曾剖其胃,约蚁升许也。”     

  ③李时珍写《蕲蛇传》,也是一个有益的故事。他父亲李言闻,研究了蕲州的特产艾叶,写成了《蕲艾传》,他读后很受启发,便决心写一本《蕲蛇传》,开始他只是从蛇贩子那里观察白花蛇,有人告诉他,这不是真正的蕲州蛇,真蕲蛇“其走如飞,牙利而毒”,人被咬后迅速致死,是当时皇帝指定进贡的制药珍品。“不入虎穴,焉得虎子”,李时珍不顾危险,几次爬上龙峰山去观察蕲蛇,目睹了它吃石南藤及被捕的情形,了解了它形体与习性上的特点,终于写出了很有特色的《蕲蛇传》。李时珍很重视这种研究方法,认为这样可以“一一采视,颇得其真”。(作者:王梓坤 选自《科学发现纵横谈》,有删改)

1.本文运用的说明顺序是__________________。

2.第①段中画线句子运用的说明方法有______________、______________。

3.请分析下列句子中加粗词语的表达作用。   

(1)这部巨著不仅对医药,而且对生物、矿物和化学也作出了重要贡献。

答:______________________________________________

(2)李时珍不顾危险,……终于写出了很有特色的《蕲蛇传》。   

答:______________________________________________

4.解释第③段中“不入虎穴,焉得虎子”的含意,并说说它体现了李时珍的什么精神?  

答:______________________________________________ 

阅读理解

阅读理解。

     You either have it, or you don't- a sense of direction, that is. But why is it that some people could find their

way across the Sahara without a map, while others can lose themselves in the next street?

     Scientists say we're all born with a sense of direction, but it is not properly understood how it works. One

theory is that people with a good sense of direction have simply worked harder at developing it. Research being

carried out at Liverpool University supports this idea and suggests that if we don't use it, we lose it.

     "Children as young as seven have the ability to find their way around. Says Jim Martland, Research Director of the project." However, if they are not allowed out alone or are taken everywhere by car, they never develop

the skills."

     Jim Martland also emphasizes that young people should be taught certain skills to improve their sense of

direction. He makes the following suggestions:

     If you are using a map, turn it so it relates to the way you are facing.

     If you leave your bike in a strange place, put it near something like a big stone or a tree. Note landmarks on

the route as you go away from your bike. When you return, go back along the same route.

     Simplify the way of finding your direction by using lines such as streets in a town. Streams, or walls in the

countryside to guide you. Count your steps so that you know how far you have gone and note any landmarks

such as tower blocks or hills which can help to find out where you are. Now you need never get lost again!

1. Scientists believe that ______.

A. some babies are born with a sense of direction

B. people learn a sense of direction as they grow older

C. people never lose their sense of direction

D. everybody possesses a sense of direction from birth

2. What is true of seven-year-old children according to the passage?

A. They never have a sense of direction without maps.

B. They should never be allowed out alone if they lack a sense of direction.

C. They have a sense of direction and can find their way around.

D. They can develop a good sense or direction if they are driven around in a car.

3. If you leave your bike in a strange place, you should ______.

A. tie it to a tree so as to present it from being stolen.

B. draw a map of the route to help remember where it is.

C. avoid taking the same route when you come back to it.

D. remember something easily recognized on the route.

4. According to the passage, the best way to find your way around is to ______.

A. ask policemen for directions.

B. use walls, streams and streets to guide yourself.

C. remember your route by looking out for steps and stairs.

D. count the number of landmarks that you see.