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分泌胃蛋白酶原的细胞是E．
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Sleepwalking (梦游)
Not all sleep is the same every night. We experience some deep, quiet sleep and some active sleep, which is when dreams happen. You might think sleepwalking would happen during active sleep, but a person isn't physically active during active sleep. Sleepwalking usually happens in the first few hours of sleep in the stage called slow-wave or deep sleep.
Not all sleepwalkers actually walk. Some simply sit up or stand in bed or act like they're awake when in fact, they're asleep! Most, however, do get up and move around for a few seconds or for as long as half an hour.
Sleepwalkers' eyes are open, but they don't see the same way they do when they're awake and often think they're in different rooms of the house or different places altogether. Sleepwalkers tend to go back to bed on their own and they won't remember it in the morning.
Researchers estimate that about 15% of kids sleepwalk regularly. Sleepwalking may run in families (在家族中世代相传) and sometimes occurs when a person is sick, has a fever, is not getting enough sleep, or is stressed (紧张的).
If sleepwalking occurs frequently, every night or so, it's a good idea for your mom or dad to take you to see your doctor. But occasional sleepwalking generally isn't something to worry about, although it may look funny or even scary (骇人的) for the people who see a sleepwalker in action.
Although occasional sleepwalking isn't a big deal, it's important, of course, that the person is kept safe. Precautions (预防措施) should be taken so the person is less likely to fall down, run into something, or walk out the front door while sleepwalking.
When does sleepwalking usually occur？
Passive Smoking is Workplace Killer
Pressure mounted on Britain on Monday to take action on(1)smoking with new research showing second-hand smoke(2)about one worker each week in the hospitality industry.
Professor Konrad Jamrozik, of Imperial College in London, told a conference on environmental tobacco that second-hand(3)kills 49 employees in pubs, bars, restaurants and hotels each year and contributes to 700 deaths from lung cancer, heart(4)and stroke across the total national work force.
"Exposure in the hospitality(5)at work outweighs the consequences of exposure of living.(6)a smoker for those staff. "Jamrozik said in an interview.
Other(7)have measured the levels of exposure to passive smoking but Jamrozik calculated how it would translate into avoidable deaths.
His findings are(8)on the number of people working in the hospitality industry in Britain, Their exposure to second hand smoke and their(9)of dying from it.
Jamrozik said me findings would apply to(10)countries in Europe because, to a greater or(11)extent, levels of smoking in the community are similar.
Professor Carol Black, president of the Royal College of Physicians, who sponsored the meeting said the research is proof of the need for a ban on smoking in(12)places.
"Environmental tobacco smoke in pubs, bars, restaurants and other public places is(13)damaging to the health of employees as well as the general public," she said in a statement.
"Making these places smoke-free not only protects vulnerable staff and the public. It will(14)help over 300, 000 people in Britain to stop smoking completely," she added.
Ireland recently became the first country to introduce a national ban on smoking in Public(15). New York and parts of Australia have taken similar measures.
workplace n. 工作场所:车间
hospitality n. 友好款待;好客;殷勤
imperial adj. 英联邦的
outweigh vt. 在重要性(或价值上)超过
vulnerable adj. 易受伤的;脆弱的
引起哮喘
疟原虫的感染阶段是
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