职称英语考试理工类新增文章改.docVIP

第六篇 Making Light of1 Sleep 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 childrens 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 eyes 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