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We guarantee that all your personal information will be treated ________ and there should be no fear at all of identity theft.

A. initially B. independently

C. confidently D. Confidentially

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An electric signal can trick a monkey’s brain into believing the animal’s finger has been touched.

Touch something, and your brain knows. The hand sends signals to the brain to announce contact was made. But that feeling of touch may not require making actual contact, tests on monkeys now show. Zapping brain cells can fool the animal into thinking its finger has touched something.

A person who has lost a limb or become paralyzed may need an artificial limb to complete everyday tasks. But such patients may not truly feel any objects they hold. The new findings point toward one day creating a sense of touch in those who use such artificial limbs. Psychologist Sliman Bensmaia of University of Chicago worked on the new tests. His team’s findings appeared on October 14 in the Proceedings of the National Academy of Sciences of the United States of America.

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In their new study, Bensmaia and his co-workers worked with rhesus monkeys (恒河猴). The scientists implanted electrodes (电极)--- small devices that can detect and relay an electrical signal—into the animals’ brains. The scientists used the electrode data to identify which neurons had become active. Then the scientists used the implanted electrodes to zap those same neurons. And the monkeys reacted as though their fingers had been touched. In fact, they hadn’t.

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“ I think the foundation is laid for human trials,” Bensmaia said.

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A. The sense of touch.

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C. is a problem of life and death

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C. looking in a particular direction

D. mimicking natural signals in the brain

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A. will use touch-sensitive devices

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D. will be tested on the electrodes

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B. fooling a clever monkey

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Exercise seems to be good for the human brain, with many recent studies suggesting that regular exercise improves memory and thinking skills. But an interesting new study asks whether the apparent cognitive benefits from exercise are real or just a placebo effect — that is, if we think we will be “smarter” after exercise, do our brains respond accordingly? The answer has significant implications for any of us hoping to use exercise to keep our minds sharp throughout our lives.

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