2. 外语
  3. The human brain contains 10 thousand million cells and each of them may have a thousand connections. So enormous (1)______ numbe

The human brain contains 10 thousand million cells and each of them may have a thousand connections. So enormous (1)______ numbe

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问题     The human brain contains 10 thousand million cells and
each of them may have a thousand connections. So enormous (1)______
numbers used to discourage us and causing us to dismiss the (2)______
possibility of making a machine with human-like ability, but
now that we have grown used to move forward at such a pace (3)______
we can be more sure. Quite soon, in only 10 or 20 years perhaps,
we will be able to assemble a machine as complex as the human
brain, and if we can we will. It may then take us a long time
to render it intelligently by loading in the right software or by (4)______
altering the architecture, but that too will happen. I think it
certain that in decades, no centuries, machines of silicon will (5)______
arise first to rival and then exceed their human ancestors. Once
they exceed us they will be capable of their own design. In real (6)______
sense they will be able to reproduce themselves. Silicon will end
carbon’s long control. And we will no longer be able to claim
ourselves to be the fine intelligence in the known universe. As (7)______
the intelligence of robots increase to match that of humans and (8)______
as their cost declines through economies of scale that we may (9)______
use them to expand our frontiers, first on earth, through their
ability to withstand environments beneficial to ourselves. Thus, (10)______
deserts may bloom and the ocean beds be mined. Further ahead,
by a combination of the great wealth this new age will bring and
the technology it will provide, the construction of a vast, man-
created world in space, home to thousands or millions of people,
will be within our power.
选项
答案causing—cause
解析 discourage和causing由and连接形成并列结构，动词形态应保持一致，都应为动词原形，而如果把discourage改为discouraging，则需要同时把used to改成be used to“习惯做某事”，这不符合命题规则，且句意不通，故将causing改为cause。
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