D The more time scientists sp

D 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 for the 3-pound organ. 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 over-grown 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 *r 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. 14. It can be inferred from the first paragraph that the most advanced supercomputer ______． A. can recognize a face and read a handwritten note B. can learn from its mistakes C. weighs only 3 pounds D. can not distribute information across an interconnected web of nerve cells 15. An ordinary computer can usually do the following except that ______． A. it must be programmed before it works B. it can only solve one problem at a time C. it is good at solving problems that can be broken down into *r logical pieces D. it is trained to make decisions 16. The expression “this two-dimensional approach” in the third paragraph refers to ______． A. the conventional computer and the neural computer B. * decisions and recognizing patterns C. sharing information and performing tasks D. the computer and the human brain 17. Scientists use software rather than hardware in their experiments because ______． A. it can avoid redesigning computer chips B. it can save a lot of time and money C. it can avoid * mistakes D. it is more like the human brain
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解题思路： 15.B.it can onlysolve one problem at a time.
解题过程：
16.C. sharing information and performing tasks.
17.B.it can save a lot of time and money
最终答案：14.D.