Do you wake up every day feeling too tired, or even upset? If so, then a new alarm clock could be just for you.
The clock, called SleepSmart, measures your sleep cycle, and waits 1 you to be in your lightest phase(stage)of sleep 2 rousing(waking)you. Its makers say that should 3 you wake up feeling refreshed every morning.
As you sleep you pass 4 a sequence of sleep states-light sleep, deep sleep and REM(rapid eye movement) sleep-that 5 approximately every 90 minutes. The point in that cycle at which you wake can 6 how you feel later, and may 7 have a greater impact than how much or little you have slept. Being roused during a light phase 8 you are more likely to wake up energetic.
SleepSmart 9 the distinct pattern of brain waves 10 during each phase of sleep, via a headband equipped 11 electrodes(电极)and a microprocessor. This measures the electrical activity of the wearer’s brain, in much the 12 way as some machines used for medical and research 13 , and communicates wirelessly with a clock unit near the bed. You 14 the clock with the latest time at 15 you want to be wakened, and it 16 duly(适时地)wakes you during the last light sleep phase before that. The 17 was invented by a group of students at Brown University in Rhode Island 18 a friend complained of waking up tired and performing poorly on a test, “ 19 sleep-deprived(被剥夺)people ourselves, we started thinking of 20 to do about it, ” says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea.
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2.A.upon B.before C.towards D.till
3.A.ensure B.force C.require D.request
4.A.through B.into C.about D.on
5.A.shows B.changes C.begins D.repeats
6.A.effect B.affect C.reflect D.perfect
7.A.already B.ever C.never D.even
8.A.means B.marks C.says D.narrates
9.A.removes B.makes C.records D.recalls
10.A.proceeded B.produced C.pronounced D.progressed
11.A. by B.of C.with D.over
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13.A.findings B.achievements C.proposals D.purposes
14.A.prompt B.program C.design D.plan
15.A.where B.this C.which D.that
16.A.then B.also C.almost D.yet
17.A.claim B.conclusion C.concept D.explanation
18.A.once B.after C.since D.while
19.A.Besides B.Despite C.To D.As
20.A.what B.how C.whether D.when