The word "carbon" ( Line 3, Para．2 ) stands for ______________

A．intelligent robots

B．a chemical element

C．an organic substance

D．human beings

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答案解析

【答案ID
【题型l词汇题
【解析】题干意为“‘carbon’代表…”。由第二段最后两句“Silicon will have ended carbon’S long control．And We,will no longer be able tO claim ourselves to be the finest intelligence in the known universe．”可以看出，Car- bon指代human beings，故选Do

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1 A robot can be used to expand our frontiers when ______________

A．its intelligence and cost are beyond question

B．it is able to bear the rough environment

C．it is made as complex as the human brain

D．its architecture is different from that of the present ones

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2 It can be inferred from the passage that ______________

A．after the installation of a great number of cells and connections, robots will be capable of self-reproduction

B．with the rapid development of technology, people have come to realize the possibility of making a machine with human-like ability

C．once we make a machine as complex as the human brain, it will possess intelligence

D．robots will have control of the vast, man-made world in space

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3 根据以下资料，回答题：
Directions: The following is a passage about environment．After reading it, you are required to complete the outline below it ( No．46 to No．50 ). You should write your answers briefly ( in no more than three words ) on the Answer Sheet correspondingly.
Environment is everything that surrounds us: plants, animals, buildings, country, air, water--in fact eve-
rything that can affect us in any way．And environment differs in different parts of the world.
Ecology is the science of how living creatures and plants exist together and depend on each other on the local environment Where an environment is undisturbed, the ecology of an area is in balance．But if a creature dies out or an alien (相异的)species is introduced, then the ecology of this area will be upset.
Man is a part of the environment and has done more to upset the ecology during his short span on earth than any other living creature．He has poisoned the atmosphere and polluted both land and water．He has wasted the earth' s natural resources with no thought for the future．He has killed a lot of precious animals for his delicacies(精美食品)on the table and for his elegant overcoats.
Since man has done so much damage, it is up to man to try to put matters right．And the sooner he does
something about it, the better.
46______________ is everything that surrounds us.

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