Question

The bed should be reserved as a place for sleep, but people tend to read an iPad a lot in bed before they go to sleep.

Charles Czeisler, a professor at Harvard Medical School, and his colleagues got a small group of people for an experiment. For five days in a row, the people read either a paper book or an iPad for four hours before sleep. Their sleep patterns were monitored all night. Before and after each trial period, the people took hourly blood tests to paint a day-long picture of just how much melatonin (褪黑激素) was in their blood at any given time.

When subjects read on the iPad as compared to the paper books, they reported feeling less sleepy at night and less active the following morning. People also took longer to fall asleep on the iPad nights, and the blood tests showed that their melatonin secretion (分泌) was delayed by an hour and a half.

The researchers conclude in today's journal article that given the rise of e-readers and the increasingly widespread use of e-things among children and adolescents, more research into the long-term consequences of these devices on health and safety is urgently needed. Czeisler and colleagues go on, in the research paper, to note：“Reading an iPad in bed may increase cancer risk.”

However, software has been developed that can reduce some of the blue light from the screens of phones and computers according to time of day, and there are also glasses that are made to filter (过滤) short wavelengths. While they seem like a logical solution for the nighttime tech users, it needs more research.

1.In Charles Czeislers experiment, all the subjects were asked to______.

A. sit in a row and receive the strict tests

B. have their sleep patterns observed all night

C. read a paper book and an iPad at the same time

D. have their blood tested per hour during the trial

2.The third paragraph tells us the iPad readers were likely to____________.

A. feel less sleepy and tired in the day

B. fall asleep more easily after reading

C. become less energetic the next morning

D. have a lot more melatonin secretion

3.The special software recently developed can______.

A. remove the blue light from your devices completely

B. help prevent eyes being harmed by short wavelength

C. weaken the harm done by doing nighttime e-reading

D. be used in all the e-things widely and safely

4.Which of the following can be the best title for the text?

A. No e-reading in bed before sleep

B. New software for night e-readers

C. Wrong behaviors before bedtime

D. No games on iPad in bed

Answer

1.B

2.C

3.C

4.A

【解析】

试题分析：这篇短文主要讲述：床是睡觉的地方，可是现在有些人喜欢在睡之前躺在床上看iPad。教授的抽查研究表明，这样对身体很有害。那么需要进一步研究更先进的可减少对身体危害的软件。

1.B 细节理解题。A sit in a row and receive the strict tests坐成一排,接受严格的测试；B. have their sleep patterns observed all night观察他们一整夜的睡眠模式；C. read a paper book and an iPad at the same time在同一时间读纸质书和ipad；D. have their blood tested per hour during the trial试验过程中每小时对他们的血液进行一次测验。根据第二自然段第三行，第四行的描述可知是在观察他们一整夜的睡眠模式，故选B。

2.C 推理判断题。A. feel less sleepy and tired in the day感觉不到疲倦和厌倦；B. fall asleep more easily after reading阅读后更容易入睡；C. become less energetic the next morning第二天早上，变得不那么精力充沛；D. have a lot more melatonin secretion有更多的褪黑激素分泌.根据第三自然段第一句话的描述和题干关键词the iPad readers，故选C。

3.C 细节理解题。A. remove the blue light from your devices completely从你的设备完全删除蓝色的光线；B. help prevent eyes being harmed by short wavelength有助于防止眼睛受到短的波长的伤害；C. weaken the harm done by doing nighttime e-reading削弱夜间电子阅读所造成的伤害；D. be used in all the e-things widely and safely被广泛和安全地用于所有电子东西中。根据最后一自然段的描述和题干要求可知，这个特殊的软件可以削弱夜间电子阅读所造成的伤害，故选C。

4.A 文章标题题。A.No e-reading in bed before sleep睡觉前不要躺在床上进行电子阅读；B.New software for night e-readers夜间电子阅读的新软件；C.Wrong behavious before bedtime睡前错误的行为；D.No games on iPad in bed不要躺在床上玩ipad游戏。根据对全文的描述和题干，故选A。

考点：自然科学类阅读