During the daytime,many people are busy using their cell phones. They only have time to charge (充電) them at night when they are asleep. But scientists have warned that having a glowing smartphone in your bedroom at night could not only affect your sleep,it could also make you fat.

    When darkness falls,our bodies begin to produce a hormone (荷爾蒙) called melatonin (視黑激素) . K helps our metabolism (新陳代謝) so that our bodies can change food and drink into energy. When the sun rises,melatonin reduces. This light-dark cycle is good for our health.

   But if you charge your phones when you are asleep,the phone releases blue light. Although it is not bright enough to light up a room,it can affect your sleep. Therefore,it slows down your metabolism and influences your body to digest (消化) food. This may make you fat.

   "Blue light is bad for health because it keeps the mind buzzing," Simon Kyle,a sleep scientist at Manchester University,told the Daily Mail. And there is strong scientific data to show the connection between sleep interference (干擾) and people's health.

    Earlier this year,leading scientists from universities including Oxford,Cambridge and Harvard,warned that a lack of sleep could cause serious problems,such as cancer,heart disease and obesity.

     Kyle suggested turning off smartphones and desktop computers a few hours before going to bed. This helps to reduce people's exposure (暴露) to artificial (人工的) light.

53. The passage shows that .

   A. it's better to charge phones during the daytime

   B. using smartphones can make you become fat

   C. using smartphones can affect your eyesight

   D. charging a smartphone in your bedroom at night may make you fat

54. What does the underlined word "It" in Paragraph 2 refer to?

   A. Melatonin. B. Body.

   C. Darkness. D. Food.

55. From the passage,we can learn the blue light from the phones can.

   A. affect our sleep

   B. slow down our metabolism

   C. influence our body to digest food

   D. All of the above.

53. D 54. A 55. D

[閱讀D篇短文大意]文章告訴我們，晚上睡覺時(shí)應(yīng)遠(yuǎn)離正 在充電的手機(jī)，因?yàn)槭謾C(jī)充電時(shí)發(fā)出的藍(lán)光不僅會影響我們的身 體健康，還可能會使我們變胖。

53. D根據(jù)第一段最后一句可知答案為D.

54. A根據(jù)第二段第一句可知It指代的是melatonin ,故選A.

55. D根據(jù)第三段的內(nèi)容可知答案為D.

題目來源：2016金考卷特快專遞陜西中考45套匯編英語第六年第五版 > 陜西省中考命題研究專家原創(chuàng)卷（四）

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