In comparison with the adult American population today, the Americans-考呗网

成人英语三级

单选题 In comparison with the adult American population today, the Americans of the
1910s__________．

A．ate more food and had more physical activities
B．ate less food but had more activities
C．ate less food and had less physical exercise
D．had more weight problems

参考答案：A进入在线模考

细节判断题。答案在第一段：Going back to the America of the 1910s。we find that people were thinner than today，yet they ate more food．In those days people worked harder physically，walked more，used machines much less and didn't watch television(回顾十八世纪初，那时的人比现在的人瘦，然而却吃得多。那时候，他们工作比现在辛苦，走路比现在多，使用机器比现在少，也不看电视)。因此A为正确答案。

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1 Modern scientific researches have reported to us that__________．

A．fat people eat less food and are less active
B．fat people eat more food than slim people and are more active
C．fat people eat more food than slim people but are less active
D．thin people run less,but have greater increase in food intake

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2根据下面资料，回答题
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 imi-tate 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 simpler logical pieces． The pro-cessors 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 infor-mation and perform tasks at the same time． This two-dimensional approach works best at rec-ognizing 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 simu-lations (模拟品) because redesigning computer chips took a lot of time and money． By exper-imenting with different approaches through software rather than hardware, scientists have been able to avoid costly mistakes．
It can be inferred from the first paragraph that a computer__________．

A．can recognize a face
B．cannot learn from its mistakes
C．cannot follow detailed instructions
D．can read a handwritten note

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3Which of the following is NOT true about an ordinary computer?

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 simpler logical pieces．
D．It is trained to make decisions．

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