试题与答案

在牙的发育阶段,服用过量的四环素族药物,使牙着色的是( ) A.釉质发育不全 B.

题型:单项选择题

题目:

在牙的发育阶段,服用过量的四环素族药物,使牙着色的是( )

A.釉质发育不全
B.氟牙症
C.四环素牙
D.牙本质发育不全症
E.牙骨质发育不全症

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错

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题型:阅读理解与欣赏

阅读下面文字,完成16—20题。

“嫦娥一号”探月的人文意义

(1)“嫦娥一号”的发射显示了中国卫星发射技术的新成就,更显示了中国航天科技的又一巨大进步,但是,从人文的角度看“嫦娥一号”探月,也许更实用,也更有意义。

(2)来一次天文知识的学习。在浩瀚的宇宙中,地球,太阳和月亮究竟代表着什么天体,三者之间的关系是什么,和其他天体的关系是什么,宇宙到底有多大,为什么尽管地球很大但是也很渺小,借助最近对“嫦娥一号”探月的好奇和欣喜,多掌握一些天文知识有助于我们更好的了解“嫦娥一号”探月的天文意义。

(3)来一次航天知识的温习。什么是人造卫星,人造卫星分哪些类别,人造卫星已经发展到什么程度,运行轨道是什么,世界各国首颗卫星发射是什么时候,人造卫星的用途是什么,中国的人造卫星历史渊源怎么样,温习这些人造卫星知识,会从航天的角度帮助我们理解为什么要实现“嫦娥一号”探月。

(4)来一次对月亮的文化念想。古今中外,在历史的长河中,留下了很多和月亮有关的历史典故、传说和作品,月亮已经变成了和人休戚相关的充满人文色彩的具有灵性的天体,感念月亮附加的文化,会让我们对月亮更加充满诗意地敬仰,月亮也是文化的月亮,月亮的人文属性对我们的人性有很大的启迪。

(5)__________________。我们很多人已经习惯于对功名的忙碌追求,我们已经习惯于平视和俯视我们前方的路,但是,我们惟独不习惯仰望星空,一个不善于仰望星空的人,往往缺乏一颗包容和清凉的心,更缺乏一种对宇宙和生命的敬畏感,也因此让我们产生了迷失感和迷茫感,不懂得星空深邃的美,就很难真正理解事业和人生,换个步伐前进,那就仰望星空吧。

(6)来一次对浪费能源的思考。人类热衷于探索月球,一个很重要的原因就是我们地球赖以生存的能源已经十分有限,然而月球上有两种资源将会给地球带来重大贡献,为解决人类面临的能源问题提供新思路。一是月球上可接收到丰富的太阳能;二是月球矿藏丰富,尤其是富含核聚变燃料氦-3,将有可能成为人类社会长期、稳定、安全、清洁和廉价的燃料资源,既然如此,节约地球能源就显得更为迫切。

(7)“嫦娥一号”探月的过程,就是我们提高科学素养,培养科学探索精神的过程,只有用科学武装我们的大脑,我们才不会落后,更是我们展开科学想象的翅膀狂想的过程,还是一种理性思考的过程,多从“嫦娥一号”探月的人文意义来看待探月,我们不但能够收获科学素养,还收获了理性的生命态度和生活感悟,这也许比一味的叫好和激动更有意义。

小题1:、给下面的黑体字注音。

浩瀚(   )       深邃(   )     矿藏(   )

小题2:、本文从哪些方面谈了“嫦娥一号”探月的人文意义?

小题3:、本文采用的结构是什么?这种结构有什么好处?

小题4:、结合第(5)段内容和前后文,划横线处应补写的一句话是。

小题5:、作者说“月亮也是文化的月亮”,让我们从与月亮有关的传说、诗句开始,“来一次对月亮的文化念想”吧!

①与月亮有关的传说:

②与月亮有关的诗句:

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题型:问答题

Exactly where we will stand in the long war against disease by the year 2050 is impossible to say. (46) But if developments in research maintain their current pace, it seems likely that a combination of improved attention to dietary and environmental factors, along with advances in gene therapy and protein targeted drugs, will have virtually eliminated most major classes of disease.

From an economic standpoint, the best news may be that these accomplishments .could be accompanied by a drop in health-care costs. (47) Costs may even fall as diseases ’are brought under control using pinpointed, short-term therapies now being developed. By 2050 there will be fewer hospitals, and surgical procedures will be largely restricted to the treatment of accidents and other forms of trauma. Spending on nonacute care, both in nursing facilities and in homes, will also fall sharply as more elderly people lead healthy lives until close to death.

One result of medicine’s success in controlling disease will be a dramatic increase in life expectancy. (48) The extent of that increase is a highly speculative matter, but it is worth noting that medical science has already helped to make the very old (currently defined as those over 85 years of age) the fastest growing segment of the population. Between 1960 and 1995, the U.S. population as a whole increased by about 45%, while the segment over 85 years of age grew by almost 300%. (49) There has been a similar explosion in the population of centenarians, with the result that survival to the age of 100 is no longer the newsworthy feat that it was only a few decades ago. U.S. Census Bureau projections already forecast dramatic increase in the number of centenarians in the next 50 years: 4 million in 2050, compared with 37, 000 in 1990.

(50) Although Census Bureau calculations project an increase in average life span of only eight years by the year 2050, some experts believe that the human life span should not begin to encounter any theoretical natural limits before 120. years. With continuing

(49) There has been a similar explosion in the population of centenarians, with the result that survival to the age of 100 is no longer the newsworthy feat that it was only a few decades ago.

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