Question

【題目】閱讀下面語言材料，然后按文后要求做題。根據(jù)材料內(nèi)容選擇最佳答案。
B
In today's world, sleep experts say that for a better night's rest, Americans should turn off their smartphones or iPad before sleeping. Such electronic products make the brain more active, and then influence their sleep. But according to a latest survey, more than 90% of Americans regularly use a computer or some other kinds of electronic products in the hour before bed.
Researchers are finding that man-made light from some electronic products at night may reduce the brain chemicals(化學(xué)物質(zhì)) that help sleep. The researchers showed that sitting in the light from computer tablets clearly lowered levels of the chemical which manages our body clocks and plays a role in the sleep cycle.
In the study, the researchers let volunteers read, play games and watch movies on a tablet for different time while measuring(測量) how much light their eyes received. They found that two hours of sitting before a bright tablet screen at night reduced the sleep chemical levels by about 22%.
Studies of students using computers at night have got the similar results. And researchers say that may not only cause sleeplessness, but also raise the risk of obesity(肥胖癥), diabetes(糖尿病) and other diseases.
To be on the safe side, the researchers advise us to use computers less before bed, or at the very least turning down your screen as much as possible.
（1）What can we learn from the first paragraph?
A.Americans don't get enough sleep.
B.Electronic products are very popular.
C.The brain becomes more active at night.
D.Sleep experts never use smartphones.
（2）The volunteers in the study did the following things EXCEPT ___________.
A.listening to music
B.playing computer games
C.watching movies
D.reading electronic books
（3）How may electronic products influence people's sleep?
A.Make our brains more active.
B.Make our body weak.
C.Lower our brains' chemicals that help sleep.
D.Change our body clocks.
（4）The underlined word ＂that＂ probably means ___________ in the passage.
A.making a survey about sleep
B.using smartphones in the daytime
C.sitting in a bright room
D.surfing the Internet at night
（5）What does the passage tell us to do to have a good sleep?
A.Learn to use smartphones or iPad.
B.Watch some relaxing TV programs.
C.Turn down the screen to the lowest.
D.Try to sleep earlier than before.

Answer 1

【答案】
（1）B
（2）A
（3）C
（4）D
（5）C
【解析】本文是一篇科普文。如今，睡眠專家認為要想晚上休息得好，美國人應(yīng)該在睡前關(guān)閉手機和平板。專家進行了一系列的研究和實驗，并說明了其中危害。研究者們建議我們睡覺前少玩電腦或者盡可能地降低屏幕的亮度。
（1）推理判斷題。根據(jù)第一段中的according to a latest survey, more than 90% of Americans regularly use a computer or some other kinds of electronic products in the hour before bed.可知，根據(jù)最新的調(diào)查，在上床睡覺前90%的多的美國人經(jīng)常使用電腦或其他電子產(chǎn)品。故選B。
（2）細節(jié)理解題。根據(jù)第三段中的In the study, the researchers let volunteers read, play games and watch movies on a tablet for different time while measuring(測量) how much light their eyes received.可知未提及聽音樂。 故選A。
（3）細節(jié)理解題。根據(jù)第二段中的Researchers are finding that man-made light from some electronic products at night may reduce the brain chemicals(化學(xué)物質(zhì)) that help sleep.可知，電子產(chǎn)品發(fā)出的人造光可能會降低我們大腦中幫助睡眠的化學(xué)物質(zhì)，從而影響我們的睡眠，故選C。
（4）細節(jié)理解題。根據(jù)第四段中的Studies of students using computers at night have got the similar results. And researchers say that may not only cause sleeplessness, but also raise the risk of obesity(肥胖癥), diabetes(糖尿病) and other diseases.可知，研究表明學(xué)生晚上用電腦也會有類似的結(jié)果。研究者表示學(xué)生晚上用電腦不僅會引起失眠同時會增加患肥胖癥、糖尿病和其他疾病的危險。故選D。
（5）細節(jié)理解題。根據(jù)最后一段中的the researchers advise us to use computers less before bed, or at the very least turning down your screen as much as possible.可知，研究者建議我們睡覺前少用電腦或者盡可能地降低屏幕的亮度。故選C。