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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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举一反三
【单选题】团体签证为一式( )份。
A.
2
B.
3
C.
4
D.
5
【简答题】在BaSO4的饱和溶液中加水使溶液体积增大一倍(溶液中仍有BaSO4固体)。待达到平衡后,[Ba2+]将________,[SO42-]将_______(增加,减小,不变)
【单选题】已 知 K sp ( BaSO 4 ) = 1.1 × 10 -10 。在 含 有 BaSO 4 固 体 的 饱 和 溶 液 中,加 入 H 2 SO 4 ,使 c ( H 2 SO 4 )= 0.1 mol · L -1 (忽 略 体 积 变 化),则 BaSO 4 沉 淀 量 _________ 。
A.
减 少
B.
增 多
C.
先 增 多 后 减 少
D.
无 变 化
【单选题】在含有固体 BaSO 4 的饱和溶液中加入少量的 BaCl 2 后 ,BaSO 4 的溶解度
A.
增大
B.
减小
C.
不变
D.
无法确定
【单选题】在含有固体 BaSO 4 的饱和溶液中加入少量的 NaCl 后 ,BaSO 4 的溶解度
A.
增大
B.
减小
C.
不变
D.
无法确定
【多选题】从网络分布的范围和距离来看,计算机网络的种类有______。
A.
wan
B.
lan
C.
internet
D.
intranet
【简答题】在含有BaSO 4 固体的饱和溶液中,当加入BaCl 2 溶液时,则BaSO 4 的 ① 减小,这种现象称为 ② 效应。
【多选题】从网络分布的范围和距离来看,计算机网络的种类有( )。
A.
WAN
B.
LAN
C.
INTERNET
D.
INTRANET
【单选题】向有 BaSO 4 固体存在的饱和 BaSO 4 溶液中加入等体积的 2 mol·L -1 的 NaCl 溶液时, BaSO 4 溶解度 ( ) 。
A.
变大
B.
变小
C.
不变
D.
不能确定
【单选题】45团体签证为一式( )份。
A.
B.
C.
. 四
D.
. 五
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