Power Napping is Good f the I.Q. Today we hear me me about the imptance of getting enoughsleep—about eight hours a night. Sleep can help heal give energy toboth the body the brain. ____1____ It seems almost certain that the thirdof our lives that we spend asleep has a great effect on the two-thirds that weare awake. Sleep affects our emotions, memy, focus, behavi. Studies show that people in developed countries spend less timeasleep me time at wk commuting. Dr. Karine Spiegel, at theUniversity of Chicago, has found that the average length of sleep has gone downfrom nine hours a night in 1910 to seven--a-half hours a night today.However, our bodies cannot function well without enough sleep. ____2____Accding to Canadian scientist Dr. Stanley Cen, every hour of lost sleep at nightcauses us to lose one I.Q. point the next day. F example, when someone getsonly five six hours of sleep each night f a week, the person’s I.Q. couldgo down 15 points me. ____3____ Most sleep experts say that humans need at least eight hours ofsleep every day, but it should be in two stages: a long sleep at night ashter nap in the afternoon. Some companies help their employees follow thisadvice. ____4____ They say this makes the wkers much me efficient. To study sleep deprivation (not getting enough sleep), scientistsuse a test called the Multiple Sleep Latency Test (MSLT). During the test, aperson stays in a darkened, quiet room during the daytime. Scientists believethat a sleep-deprived person will fall asleep quickly. If it takes ten minutes longer to fall asleep, the person is probably getting enough sleep. Scientists have also found that the time of year seems to affect howmuch sleep we need. ____5____ However, in the summer, people sometimes sleep aslittle as six hours, without having any problems. 　　词汇： emotion n. 情绪 commuting n. 乘公交车上下班，通勤 I.Q. n. 智商(全称为intelligent quotient) deprivation n. 剥夺，匮乏 Sleep Latency Test n. 睡眠潜伏期 　　注释： 1.have/has an effect on... 对……有效果的 2.go down from... to...从………降至…… 　　练习：