8. the signals that synchronize the body's clock:平衡生物钟的光信号 练习: 1 .The clock located inside our brains is similar to our bedside alarm clock because A it controls when we wake,when we eat and when we sleep. B it has a cycle of 24 hours. C it is a cycle also called circadian rhythm. D it can alarm any time during 24 hours. 2. What is implied in the second paragraph? A Young children's biological clock has the same rhythm with that of the teenagers.
B People after puberty begin to go to bed earlier due to the change of the biological clock. C Children before puberty tend to fall asleep earlier at night than adolescents. D Teenagers go to bed later than they used to due to the light from the computer screen. 3. In the third paragraph the author wants to tell the reader that A it is natural for teenagers to stay up late and get up late. B staying up late has a bad effect on teenagers' ability to think and learn. C during puberty most teenagers experience a kind of gray cloud. D it is hard for teenagers to get out of bed in the morning. 4. Which of the following statements is NOT true according to the fourth and fifth paragraphs? A Our biological clock resets itself automatically. B light gets through our eyes and resets our biological clock. C Our internal clock as well as the alarm clock can be reset automatically. D Our internal clock,like the alarm clock,can be reset. 5. According to the last two paragraphs, what did the previous researchers think about the human eye's light-sensing system? A The human eye had two light-sensing systems. B The human eye had one light-sensing system. C The human eye could sense the light of day more quickly than the dark of night. D The human eye could reset our internal clocks in accordance with the alarm clocks. 答案与题解: 1.B 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。 2. C 第二段主要内容是告诉读者,过了青春期(puberty),由于生物钟节奏的变化,青少年(adolescents and teenagers)比以前要晚睡几小时。所以C是该段所隐含的内容。 3. B 第三段的最后一句直接给出了答案。 4. C 根据第四和第五段的内容,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,C是正确选择,因为闹钟不能自动重新设定时间。 5.B 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,即,the signals that synchronize the body's clock were handled through the same pathways that we use to see (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。
不要太在意睡眠
问题及正确答案译文
①位于大脑中的生物钟跟床边的闹钟是相似的,因为_________.
②第二段暗示了________。
③在第三段,作者想告诉我们 。
④根据第四和第五段,以下陈述不正确的是___________.
⑤根据最后两段,之前的研究者们对人眼的感光系统的观点是 。
6. 不要太在意睡眠(理C)
①生物钟有24小时的周期
②青春期以前的孩子比青少年晚上入睡早
③熬夜对青少年的思维能力和学习能力很不利
④我们的生物钟跟闹钟一样可以自动重置
⑤人类的眼睛有一个感光系统
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