下列工具中哪些是唐朝时候创造的①耧车②翻车③曲辕犁④筒车 A.①③④ B.②③④

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问题:

下列工具中哪些是唐朝时候创造的①耧车②翻车③曲辕犁④筒车

A.①③④

B.②③④

C.③④

D.②③

考点:贞观之治
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如图所示的4个装置中,小鱼存活时间最长的是(  )

A.A

B.B

C.C

D.D

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Until recently, the "science of the future" was supposed to be electronics and artificial intelligence. Today it seems more and more likely that the next great breakthroughs in technology will be brought through a combination of those two sciences with organic chemistry and genetic engineering. This combination is the science of biotechnology.

Organic chemistry enables us to produce marvelous synthetic materials. However, it is still difficult to manufacture anything that has the capacity of wool to conserve (保存) heat and also to absorb moisture. Nothing that we have been able to produce so far comes anywhere near the combination of strength, lightness and flexibility that we find in the bodies of ordinary insects.

Nevertheless, scientists in the laboratory have already succeeded in "growing" a material that has many of the characteristics of human skin. The next step may well be "biotech hearts and eyes" which can replace diseased organs in human beings. These will not be rejected by the body, as is the case with organs from humans.

The application of biotechnology to energy production seems even more promising. In 1996 the famous science fiction writer, Arthur C. Clarke, many of whose previous predictions have come true, said that we may soon be able to develop remarkably cheap and renewable sources of energy. Some of these power sources will be biological. Clarke and others have warned us repeatedly that sooner or later we will have to give up our dependence on non-renewable power sources. Coal, oil and gas are indeed convenient. However, using them also means creating dangerously high levels of pollution. It will be impossible to meet the growing demand for energy without increasing that pollution to catastrophic (灾难性的) levels unless we develop power sources that are both cheaper and cleaner.

It is attempting to think that biotechnology or some other "science of the future" can solve our problems. Before we surrender to that temptation we should remember nuclear power. Only a few generations ago it seemed to promise limitless, cheap and safe energy. Today those promises lie buried in a concrete grave in a place called Chernobyl, in the Ukraine. Biotechnology is unlikely, however, to break its promises in quite the same or such a dangerous way.

小题1:According to the passage, the science of the future is likely to be ________.

A.electronics

B.biotechnology

C.genetic engineering

D.nuclear technology小题2:The materials produced with organic chemistry are ________.at present.

A.as good as wool

B.as good as an insect's body

C.better than natural materials

D.not as good as natural materials小题3:According to the passage, it may soon be possible ________.

A.to transplant human organs

B.to make artificial hearts and eyes

C.to produce drugs without side effects

D.to make something as good as human skin小题4:In 1996, Arthur C. Clarke predicted that_______.

A. the Chernobyl disaster would happen in two years

B. we will never stop using non-renewable power sources biological  

C. oil, gas and coal could be repeatedly used in the future

D. power sources would be put into use soon

小题5:What do we learn from the last paragraph?

A.Biological power will keep all its promises.

B.Biological power is cheaper than nuclear power.

C.Biotechnology can solve all our future energy problems

D.Biological power may not be as dangerous as nuclear power

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最先发生的尸体现象是( )

A.尸冷
B.尸斑
C.尸僵
D.尸体腐败
E.尸软

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“没有祖国就没有幸福,每个人必须根植于祖国土壤里。”屠格涅夫这句话告诉我们的道理是    [ ]

A.我们都是龙的传人

B.炎黄子孙一脉相承

C.祖国的生存和发展是个人生存和发展的基础

D.振兴中华是全世界每个公民的义务

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下列对于“扶清灭洋”口号的评述正确的是:()

①它是对客观世界的正确反映;

②它突出反映了当时社会的最主要矛盾;

③对它的评价应采取两点论的观点;

④它说明义和团对中外反动势力处于感性认识阶段。

A.①②③④

B.②③④

C.③④

D.①②③

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