2. 职称英语
  3. The more time scientists spend designing computers, the more they wonder at h

The more time scientists spend designing computers, the more they wonder at h

游客2024-01-16  15
问题    The more time scientists spend designing computers, the more they wonder at human brain. Tasks that puzzle the most advanced supercomputer—recognizing a face, reading a handwritten note —are child’s play. Most important, unlike any ordinary computer, the brain can learn from its mistakes. Researchers have tried for years to program computers to imitate the brain’s abilities, but without success. Now a growing number of designers believe they have the answer: if a computer is to work more like a person and less like an overgrown calculator it must be built more like a brain, which distributes information across a vast interconnected web of nerve cells or neurons.
   Ordinary computers work by following a chainlike sequence of detailed instructions. Although very fast, their processors can perform only one task at a time. This approach works best in solving problems that can be broken down into simpler logical pieces. The processors in a neural-network computer, by contrast, form a network much like the nerve cells in the brain. Since these artificial(人造的)neurons are interconnected, they can share information and perform tasks at the same time. This two-dimensional approach works best at recognizing patterns.
   Instead of programming a neural-network computer to make decisions, its maker trains it to recognize patterns in any solution to a problem by repeatedly feeding examples to the machine.
   Neural networks come in all shapes and sizes. Until now most existed as software simulations(模拟品)because redesigning computer chips took a lot of time and money. By experimenting with different approaches through software rather than hardware, scientists have been able to avoid costly mistakes. [br] The main feature of a neural-network computer is that______.
选项 A、its processors act as an interconnected web of neurons
B、it is programmed to make decisions
C、its networks are of all shapes and sizes
D、its neurons are artificial
答案 A
解析 本题问到神经网络计算机的主要特点，从第二段这句The processors in a neural-network computer，by contrast，form a network much like the nerve cells in the brain可以看出，神经网络计算机的处理器能够形成跟大脑神经细胞很相似的网络，也就是指interconnected web of neurons(互相交错的神经网)，这正是这种计算机不同于普通计算机最显著的特点。A为正确选项。
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