试题与答案

患者咳嗽,咯痰色黄黏稠,咯之不爽,伴鼻流黄涕,汗出恶风,舌苔薄黄,脉浮数。治疗应首选

题型:单项选择题 A2型题

题目:

患者咳嗽,咯痰色黄黏稠,咯之不爽,伴鼻流黄涕,汗出恶风,舌苔薄黄,脉浮数。治疗应首选()

A.杏苏散

B.桑菊饮

C.止嗽散

D.二陈汤

E.清金化痰汤

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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题型:阅读理解与欣赏

阅读下面选文,完成问题。

神秘的人体“天网”

  ①常言道:天网恢恢,疏而不漏。意思是说,在人类社会中,一些坏人在作恶以后,自以为能侥幸逃脱,但最终还是鬼使神差地被缉拿归案,就好像冥冥之中有个天网,使得坏人终究得伏法认罪。冥冥之中究竟有没有天网?这暂且不论。科学家发现,人类社会中看不见、摸不着的天网,在人体里竟然真的存在!

  ②前不久,德国科学家在观察人体免疫系统对付细菌的过程中意外发现,在那些被人体灭菌勇士白血球杀死的细菌周围,经常会看到一些丝状体物质。起初,他们以为这是显微镜的镜片不干净导致的观察错觉。但后来他们发现,这些丝状物总是在细菌进入人体后,很快就出现在细菌周围。它们相互缠绕,构成了网。这些网就像蜘蛛网那样,能够迅速把细菌横七竖八地粘在上面,从而将细菌擒拿。随后,这些网就密切配合人体白细胞里的其他物质,把被擒拿的细菌毒杀或者吞吃掉。

  ③更为奇特的是,这种由丝状体物质构成的网还能对人体内健康的细胞起到保护作用。实验发现,在对付病毒的战斗中,有一种细胞分泌出来的蛋白酶在同细菌作战的时候,有时候会伤及无辜,给人体健康细胞造成伤害。为了避免或减少这种伤害事件的发生,这个网凭借自身的粘性,主动把这些蛋白酶集中到病菌密集的局部地方,帮助它们认准来犯之敌,同时避免误伤健康细胞。最让人感动的是,这些由丝状体物质编成的网,在发挥完杀敌和护体作用后,就自行化解,神秘地消失了。

  ④为了搞清楚人体免疫系统内部发生的这一神奇现象,德国科学家把目光锁定在了一种叫做中性粒细胞的身上,因为“天网”总是出现在它们周围。中性粒细胞已是人体白血球中的主力成员:正常人每立方毫米的血液大约有白血球5000~10000个,这其中,中性粒细胞就占了55%~70%。他们也知道,中性粒细胞具有追踪病菌和吞噬、毒杀病菌的能力,是人体内抵御病菌最出色的勇士。但中性粒细胞究竟与“天网”有没有关系,还是个未知数。在电子显微镜下,德国科学家对一群中性粒细胞进行了追踪观察,结果发现,中性粒细胞在有细菌的环境里,会马上被唤醒并向细菌围拢。当它们靠近细菌后,先前没有出现的“天网”不久便悄然出现了,但在没有细菌出现的环境里,则只有中性粒细胞在自由活动,唯独不见“天网”的踪影。

  ⑤科学家通过细致观察和辨认,最后揭开了谜底。原来,白血球里的中性粒细胞在发现细菌入侵的敌情后,会马上奔赴疆场,与细菌拼杀。这些投入到疆场的中性粒细胞注定要成为烈士,因为它们就像是过河的小卒,从不知道退路在哪里,而且它们的寿命只有几个小时。这些投入疆场的勇士,在与细菌拼杀到筋疲力尽的时候,便自行“剖腹”解体,从体内抛出丝状体物质。众多勇士的丝状体物质缠绕在一起,就构成了细菌难逃的“天网”。让人惊讶的是,构成“天网”的丝状体物质,恰恰就是隐藏在中性粒细胞内部的DNA!

  ⑥人体内由DNA编织的“天网”被发现后,这种奇特现象立即触发了许多医学家的联想和灵感。他们发现,过去许多非常难解的医学迷案,现在看来可能与人体“天网”有关。例如医学上有一种叫做先天性黏液稠厚症,它的特点是人体肺部的分泌物过于黏稠,很容易堵塞人的呼吸通道,使人断气而亡。奇怪的是,那些分泌物中总是有数量极大的DNA。长久以来,医学专家只知道这种疾病肯定和基因有关,但其中的疾病制造内幕总是弄不清楚。现在,他们才明白,这很可能是中性粒细胞在肺部抛出的“天网”过密、过多导致的。

  ⑦科学家认为,人体“天网”的发现,为人类研究自身免疫系统和相关疾病的研究,开辟了一个前所未有的新天地,但现在只是一个开端,因为人体“天网”本身还有许多谜题待解,如究竟是什么信号会促使中性粒细胞抛出它们“天网”的;细胞内的DNA又是通过什么路径被释放出来的;当它们把细菌一网打尽之后,又是怎样神秘消失的……等等。尽管如此,科学家坚信,这个惊人发现,定能为人类健康带来福音!(选自《知识窗》)

1.“那么,‘天网’究竟是中性粒细胞抛出的呢,还是细菌抛出的呢?‘天网’到底是由什么物质编织的呢?”这是一个过渡段,它是从选文中摘录的,请问应将它放回选文哪两段之间?

应放在第(   )段和第(   )段之间。

2.阅读选文第⑤段,在A、B、C、、D四处填写恰当内容,用简明的语言准确概括出人体“天网”的形成过程。(每空不超过6个字)

中性粒细胞:A→与细菌拼杀→B________→C________→D________→构成“天网”

3.选文第④段中画线部分使用了列数字的说明方法,有什么作用?

答:______________________________________

4.选文第⑥段“他们发现,过去许多非常难解的医学迷案,现在看来可能与人体‘天网’有关”一句中,加粗词语“可能”有什么表达作用?

答:______________________________________

5.选出下列对选文理解不正确的一项(   )

A.选文开头引用“天网恢恢,疏而不漏”这一成语,增加了读者的阅读兴趣,引出说明对象——“人体天网”。

B.在有细菌出现的环境里,不见“天网”活动的踪影,只有中性粒细胞在自由活动。

C.人体“天网”的发现,为人类自身免疫系统和相关疾病的研究,开辟了一个新天地,但到止前为止,有关人体“天网”的许多问题尚待科学去研究。

D.选文彩逻辑顺序,思路清晰,结构严谨。

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题型:单项选择题


With 2005 fast becoming "the year of the natural disaster", it is time to reflect on how engineering, science and technology can play their fullest part in protecting the planet.
Long before the Asian tsunami struck, the science community predicted the particular region of Indonesia to be hit by the next big earthquake; and the engineering and technology community had developed early warning systems costing only $ 30 million. But no government in the region heeded the warnings and no early warning systems were in place. We ignored technology of the advance warnings at our peril of 100,000 victims of the tsunami.
Governments are not alone in ignoring the views of their scientific community; the public too has its doubts. Part of the reason for this lack of confidence must be down to the failure to engage them in a meaningful way about their concerns. Trust is a two-way street. Instead of claiming that everything would be rosy in the scientific garden "if only the public understood", we must work hard to explore concerns, discover fears and delve deep into the depths of public perceptions. We are getting there. There is a growing realization that effective public engagement is of far greater value than banging the "public understanding" drum.
There are still doubters, of course, and sadly their cause is helped whenever they come across opinions presented as fact. All of us must guard against this debilitating practice. In time, effective public engagement should help deliver improved trust as well as better policy, which -- in turn -- might make it more difficult for scientists’ warnings to be ignored.
Today’s technology community is a triumph of international collaboration where engineers and scientists combine to develop solutions to our biggest problems. Of course, technology cannot stop natural disasters but it can mitigate their impact. We are able to identify the birds affected by avian flu. We can chart their migration patterns around the world. We have the means to pursue vaccines. And we have the communication channels to keep people informed.
Extolling the virtues of technology is not to pretend technology is perfect in every regard. Far from it. The profligate and unsustainable use of technology in energy and transport has contributed to climate change. But that doesn’t mean technology has failed us. We must never lose sight of the fact that technology itself will deliver the solutions to the very problems it can create. If we do, technology will remain sidelined and undervalued, and this major social failure will progressively disadvantage us all.
Our vision is of a society embracing technology as a weapon of both progress and defense. Since the beginning of civilization, we have relied on it and enjoyed its benefits -- and most new technologies have had hugely beneficial effects for most people. But now, in an age when the death toll from natural disasters is increasing year on year, with more people living in danger zones, it is ever more urgent that we rely on science and technology to warn us of the dangers to come and provide the solutions we need.

The last sentence of Paragraph 3 means that ______.

A.engaging people effectively in what they are concerned about is much more valuable than just complaining about people’s ignorance of understanding science

B.to make people take part in what they are interested in, the scientific community should beat drums hard to arouse their interest

C.the better way to engage people in what they are concerned about is to teach them how to beat a drum

D.none of the above

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