每周一聽——那些年我們一起練過的聽力（第104期）

如果對本活動有興趣就收聽我吧！�。�

    注意：參與活動的蟲子請把自己的答案以站內信形式發(fā)送給我，并在活動帖里占位回復，方便評分，下周六下期活動發(fā)布之前有效哦。還有其他不懂之處，請在此帖里面直接留言回復，我們將盡快回答。
    PS：站內信的發(fā)送方式為：點擊我的用戶名（杜小丫個人主頁http://www.gaoyang168.com/bbs/space.php?uid=1917265 ），將答案輸入對話框點擊發(fā)送即可。別忘記回帖占座喔！

獎項——聽寫后正確填空者可得BB獎勵
評分規(guī)則：
每篇設空十處，每答對一空獎勵一個BB，全對的蟲子可得15個BB獎勵。有好的建議大家可以跟帖留言，加油哦~~~~~~

         

          The next time you think about going without sleep, consider this: Laboratory animals that are kept     (1)    for long periods of time ... die.

          Yet sleep scientist Ying-Hui Fu at the University of California, San Francisco, says little is known about the basic need for sleep.

          YING-HUI FU: "We do not why some humans need more sleep; why some humans need less sleep; why, when we do not sleep, we do not function very well. We just do not know much about sleep at all."

          But here is something that scientists now know: A team   (2)    by Professor Fu has reported the first genetic link to how much sleep we need.   

          The team was looking for a natural clock in the body that controls sleep and    (3)    . What they found was a genetic    (4)    . People who have this mutation need less sleep than others.

           But keep in mind that the scientists say this mutated gene may be rare. The study involved two members of an     (5)    family. They did fine on just six hours of sleep a day. Studies have shown that over time, most humans need eight to eight and a half hours of sleep for the best health.

          To test their theories, the scientists genetically    (6)    the mutation in mice. The mice with the mutation needed less sleep than normal mice. They were also more active even after being kept awake.

          The study appears in the journal Science. The researchers will continue to study the mice to test whether the gene is related to other medical conditions. And they will study whether it is involved in controlling sleep quantity alone, or also what scientists call the "wakefulness-behavioral drive." This drive is important for getting food,    (7)      and mates.

         How you sleep can be as important as how much you sleep -- especially for newborn babies. A new report says images in parenting and women's magazines may send the wrong message about how to put babies to bed.

        The study found that more than one-third of the pictures in women's magazines showed babies in unsafe sleeping    (8)    . They showed babies sleeping on their sides or stomachs. Also, only a third of the pictures showed sleep environments considered safe by the American Academy of Pediatrics.

        The academy says babies should sleep on their    (9)    . It says they should be placed on a separate sleeping surface from their parents, without blankets, pillows or other soft bedding. These guidelines are credited with reducing cases of sudden   (10)    death syndrome in the United States.

上期答案
1 Breastfeeding
2 grew
3 stepdaughters
4 consulting
5 guides
6 instinctive
7 hard-wired
8 crawl
9 lean
10 diabetes