问题 单项选择题

患者,女性,25岁,大便时突发右侧肢体活动不灵。查体:意识清,失语,二尖瓣区可闻隆隆样舒张期杂音,心房纤颤,右侧偏瘫,上肢重于下肢,右偏身痛觉减退。最可能的诊断是()

A.脑栓塞

B.脑出血

C.蛛网膜下隙出血

D.脑血栓形成

E.短暂性脑缺血发作

答案

参考答案:A

阅读理解与欣赏

动物的生死友谊

  ①动物世界是一个神奇的世界。弱肉强食是动物界的自然法则,强者和弱者之间似乎天生就是一种“水火不相容”的关系。但是令人难以相信的是,它们之间居然也能朝夕与共,和睦相处。  

       ②非洲蜜獾是一种孤独的动物,经常独来独往。但是因为它喜食蜂蜜,和一种褐色小鸟--响蜜鸟结下了“甜蜜的友谊”。一个找蜜,另一个挖蜜,然后共同享用。在非洲,很多蜜蜂都选择在地上建巢。当响蜜鸟发现蜂巢以后,就会向蜜獾的洞飞去,发出一种特殊的叫声。一听到这种呼叫信号,蜜獾就立即钻出洞来,在响蜜鸟的带领下向蜂巢跑去。蜜獾的毛又密又厚,所以蜜蜂奈何不了它。很快蜜獾就把蜂巢挖开了,一股脑儿将蜜和蜜蜂的幼虫全部吃掉,最后把空蜂房留给响蜜鸟。而响蜜鸟想要的正是空蜂房——蜂蜡。在响蜜鸟的嗉囊里有许多共生菌和酵母菌,这些菌类能分解蜂蜡,把它变成脂肪,从而使机体能够吸收。  

       ③然而,并非仅仅为了“嘴馋”的共同利益才使动物们联合起来,有时是安全的需要,把一些不同的动物牵扯到一起。  

       ④在中美洲有一种文鸟,这种小鸟会编织很复杂的巢,巢的样子就像一个罐子吊在树枝上。在热带,有猴类、野猫、蜥蜴、蛇等,它们都善于爬树,所以鸟类想要保全自己的后代不受侵害很困难。不过,那些凶恶的动物并不敢冒险爬进文鸟的“罐子”里,因为它常常把巢安置在黄蜂巢旁边,正是黄蜂巢--这个可怕的大球在保护着小鸟。有趣的是,黄蜂从不得罪自己的邻居,而对侵犯小鸟的各种敌人却毫不留情。  

       ⑤从昏黑的深海,到充满激流的岸边,到处都有寄居蟹。寄居蟹可以栖息在任何腹足类的贝壳里。如果没有空贝壳,寄居蟹就会发起进攻,把“主人”一块块地从“房子”里撕扯出来,自己移进去,然后它就用一只螯堵住贝壳的入口。可是海洋中有些凶猛的动物并不害怕寄居蟹的大螯。比如章鱼就不怕,章鱼用有力的“手腕”很容易“破门而入”,把寄居蟹从贝壳中拉出来。为了防范“强盗”的进攻,寄居蟹备有一种特殊的武器,那就是寻找海底的“毒花”——海葵,并和海葵在一起生活。海葵的毒性很大,一点儿海葵毒汁就可以毒死一只美洲虎。海洋里的动物对海葵都尽量远远地避开,它们都害怕这些“毒花”。但寄居蟹并不害怕,因为海葵可以成为它们的义务卫士。  

       ⑥科学界已知有400多种寄居蟹,但它们与海葵的关系各不相同。比如,真寄居蟹和疣海葵的关系可以说是相依为命。如果把它们分开,疣海葵两三个月就会死掉,而真寄居蟹因为得不到疣海葵毒汁的保护,过不了几天就会被贪婪的螃蟹或章鱼吃掉。所以真寄居蟹往往把海葵放在“门槛”上——在接近贝壳入口的下面。疣海葵的毛孔就好像是堡垒的枪眼一样,从那里可以飞射出毒“箭”,射伤那些侵犯真寄居蟹的敌人。而疣海葵的嘴正好在真寄居蟹的后面,当蟹吃东西时,疣海葵也就随着一起就餐——用触手去抢被真寄居蟹扯碎的食物。  

       ⑦动物之间友谊与合作的故事几乎是讲不完的,这些故事是那么动听、奇妙,其中的奥秘正等待着科学工作者去探索、去揭示。

1.浏览全文说明“友谊”的含义。

                                                                                                                    

2.分析下面句中画线词语的作用。

(1)强者和弱者之间似乎就是一种“水火不相容”的关系。 

                                                                                                                                        

(2)可是海洋中有些凶猛的动物并不害怕寄居蟹的大螯。

                                                                                                                                         

3.第④段画线句子用了什么说明方法?有什么作用?

                                                                                                                                                        

4.为什么真寄居蟹和疣海葵的关系可以说是相依为命?了解动物间的这种关系对你有什么启发?

                                                                                                                                                         

单项选择题

"A good newspaper is a nation talking to itself," mused Arthur Miller in 1961. A decade later, two reporters from the Washington Post wrote a series of articles that brought down President Nixon and the status of print journalism soared. At their best, newspapers hold governments and companies to account. They usually set the news agenda for the rest of the media. But in the rich world newspapers are now an endangered species.
Of all the old media, newspapers have the most to lose from the Internet. Circulation has been falling in the U. S., Western Europe and Latin America for decades. But in the past few years the web has hastened the decline. In his book The Vanishing Newspaper, Philip Meyer calculates that the first quarter of 2043 will be the moment when newsprint dies in the U. S. as the last exhausted reader tosses aside the last crumpled edition.
Newspapers have not yet started to shut down in large numbers, but it is only a matter of time. Over the next few decades half the rich world’s general papers may fold. Jobs are already disappearing. According to the Newspaper Association of America, the number of people employed in the industry fell by 18% between 1990 and 2004.
Having ignored reality for years, newspapers are at last doing something. In order to cut costs, they are already spending less on journalism. Many are also trying to attract younger readers by shifting the mix of their stories towards entertainment, lifestyle and subjects that may seem more relevant to people’s daily lives than international affairs and politics are. They are trying to create new businesses on-and offline. And they are investing in free dally papers. So far, this fit of activity looks unlikely to save many of them. Even if it doest, it bodes ill for the public role of the Fourth Estate.
Nobody should relish the demise of once-great titles. But the decline of newspapers will not be as harmful to society as some fear. Democracy, remember, has already survived the huge television-led decline in circulation since the 1950s. It has survived as readers have shunned papers and papers have shunned what was in stuffier times thought of as serious news. And it will surely survive the decline to come.
The usefulness of the press goes much wider than investigating abuses or even spreading general news; it lies in holding governments to account -- trying them in the court of public opinion. The Internet has expanded this court. Anyone looking for information has never been better equipped. People no longer have to trust a handful of national papers or, worse, their local city paper.
In future, some high-quality journalism will be backed by non-profit organizations. Already, a few respected news organizations sustain themselves that way. An elite group of serious newspapers available everywhere online, independent journalism backed by charities, thousands of fired-up bloggers and well-informed citizen journalists: there is every sign that Arthur Miller’s national conversation will be louder than ever.

Paragraph 6 doesn’t claim the Internet to be the killer of newspapers in that the Internet ______.

A.helps spread general news

B.involves itself in investigating abuses

C.expands the court of public opinion to hold governments to account

D.makes people trust a handful of national papers