现在的未来，也许还重复着年少时经历的故事，可我的心却在历经沧桑之后学会的淡然，学会了沉寂。这不是消极，只是站在更高的位置来看待生活。以下是小编为大家搜整理的2017职称英语试题阅读理解练习，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!
请根据短文内容，回答1~5题。
Making Light of Sleep
All we have a clock located inside our brains. Similar to your bedside alarm clock, your intemal clock runs on a 24-hour cycle.-This cycle, called a circadian rhythm, helps control when you wake,when you eat and when you sleep.
Somewhere around puberty, something happens in the timing of the biological clock. The clock pushes forward, so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it's time for bed, your body may be pushing you to stay up for several hours more.
And the light coming from your computer screen or TV could be pushing you to stay up even later.
This shift is natural for teenagers. But staying up very late and sleeping late can get your body's clock out of sync with the cycle of light and dark. It can also make it hard to get out of bed in the morning and may bring other problems, too. Teenagers are put in a kind of a gray cloud when they don't get enough sleep, says Mary Carskadon, a sleep researcher at BrownUniversity. It affects their mood and their ability to think and learn.
But just like your alarm clock, your internal clock can be reset. In fact, it automatically resets itself every day. How? By using the light it gets through your eyes. Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks. For years,researchers thought that the signals that synchronize the body's clock were handled through the same pathways that we use to see.
But recent discoveries show that the human eye has two separate light-sensing systems. One system allows us to see. The second system tells our body whether it's day or night.
clock located inside our brains is similar to our bedside alarm clock because __________.
controls when we wake, when we eat and when we sleep
has a cycle of 24 hours
is a cycle also called circadian rhythm
can alarm any time during 24 hours
is implied in the second paragraph?
g children's biological clock has the same rhythm with that of the teenagers.
le after puberty begin to go to bed earlier due to the change of the biological clock.
dren before puberty tend to fall asleep earlier at night than adolescents.
agers go to bed later than they used to due to the light from the computer screen.
the third paragraph the author wants to tell the reader that __________.
is natural for teenagers to stay up late and get up late
ing up late has a bad effect on teenagers' ability to think and learn
ng puberty most teenagers experience a kind of gray cloud
is hard for teenagers to get out of bed in the morning
h of the following statements is NOT tree according to the fourth and fifth paragraphs?
biological clock resets itself automatically.
t gets through our eyes and resets our biological clock.
internal clock as well as the alarm clock can be reset automatically.
internal clock, like the alarm clock, can be reset.
rding to the last two paragraphs, what did the previous researchers think about the human eye's light-sensing system?
human eye had two light-sensing systems.
human eye had one light-sensing system.
human eye could sense the light of day more quickly than the dark of night.
human eye could reset our intemal clocks in accordance with the alarm clocks.
1.参考答案：B
参考解析： 细节题。题干：大脑中的钟与你床边的钟类似，因为__________。第一段第二句提供了答案，句中的your internal clock即指a clock located inside Our brains。故选B。
2.参考答案：C
参考解析： 推理题。题干：第二段暗含了什么意思?第二段主要告诉读者过了青春期(puberty)，由于生物钟节奏的变化，青少年(adolescents andteenagers)比以前要晚睡几小时。所以C是该段所隐含的内容。
3.参考答案：B
参考解析： 细节题。题干：第三段中，作者想告诉读者__________ 。第三段的最后一句直接给出了答案。
4.参考答案：C
参考解析： 细节题。题干：根据第四段和第五段所述，下列哪一个不正确?根据第四和第五段的内容可知，闹钟和生物钟都可以重新设定时间，但生物钟能通过眼睛接受的日光来自动调节生理节奏。所以A、B和D都是这两段中所述内容，故C是正确选项。
5.参考答案：B
参考解析： 推理题。题干：根据最后两段的内容，以前的研究者如何看待人类眼睛的'光感系统?问题使用的是过去时，问的是研究者在最新发现(recent discoveries)之前对眼睛感光系统的认识。文中提到，眼睛所接受到的平衡生物钟的光信号同样作用于人类的视觉系统，也就是说，研究者之前认为人类的眼睛只有一个感光系统。但最新发现却是，人的眼睛有两个感光系统。
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