A Brown University sleep researcher has some advice for people who run high schools: Don't start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce (确保) bedtime. Instead, it may be that biologically these sleepyhead students aren't used to the early hour.
"Maybe these kids are being asked to rise at the wrong time for their bodies," says Mary Carskadon, a professor looking at problem of adolescent (青春期的) sleep at Brown's School of Medicine.
Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns.
Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.
Sleep patters change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at nigh and sleep later in the morning. But it's not just a matter of choice — their bodies are going through a change of sleep patters.
All of this makes the transfer from middle school to high school — which may start one hour earlier in the morning — all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the "sleep late, rise late" pattern, adolescent are up against difficulties when it comes to trying to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body's way of saying. "I need a timeout."
1.Carskadon suggests that high schools should not start classes so early in the morning because ________.
A. it is really tough for parents to enforce bedtime
B. it is biologically difficult for students to rise early
C. students work so late at night that they can't get up early
D. students are so lazy that they don't like to go to school early
2.The underlined phrase "nod off" most probably means " ________".
A. turn around B. agree with others C. fall asleep D. refuse to work
3.What might be a reason for the hard transfer middle school to high school?
A. Adolescents depend more on their parents.
B. Adolescents have to choose their sleep patterns.
C. Adolescents sleep better than they did at childhood.
D. Adolescents need more sleep than they used to.
4.What is the text mainly about?
A. Adolescent heath care.
B. Problems in adolescent learning.
C. Adolescent sleep difficulties.
D. Changes in adolescent sleep needs and patterns.
九年级英语阅读理解中等难度题
A Brown University sleep researcher has some advice for people who run high schools: Don't start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce (确保) bedtime. Instead, it may be that biologically these sleepyhead students aren't used to the early hour.
"Maybe these kids are being asked to rise at the wrong time for their bodies," says Mary Carskadon, a professor looking at problem of adolescent (青春期的) sleep at Brown's School of Medicine.
Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns.
Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.
Sleep patters change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at nigh and sleep later in the morning. But it's not just a matter of choice — their bodies are going through a change of sleep patters.
All of this makes the transfer from middle school to high school — which may start one hour earlier in the morning — all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the "sleep late, rise late" pattern, adolescent are up against difficulties when it comes to trying to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body's way of saying. "I need a timeout."
1.Carskadon suggests that high schools should not start classes so early in the morning because ________.
A. it is really tough for parents to enforce bedtime
B. it is biologically difficult for students to rise early
C. students work so late at night that they can't get up early
D. students are so lazy that they don't like to go to school early
2.The underlined phrase "nod off" most probably means " ________".
A. turn around B. agree with others C. fall asleep D. refuse to work
3.What might be a reason for the hard transfer middle school to high school?
A. Adolescents depend more on their parents.
B. Adolescents have to choose their sleep patterns.
C. Adolescents sleep better than they did at childhood.
D. Adolescents need more sleep than they used to.
4.What is the text mainly about?
A. Adolescent heath care.
B. Problems in adolescent learning.
C. Adolescent sleep difficulties.
D. Changes in adolescent sleep needs and patterns.
九年级英语阅读理解中等难度题查看答案及解析
A Brown University sleep researcher has some advice for people who run high schools: Don’t start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce(确保) bedtime. Instead, it may be that biologically(生物学上) these sleepyhead(瞌睡虫)students aren’t used to the early hour.
“Maybe these kids are being asked to rise at the wrong time for their bodies,” says Mary Carskadon, a professor looking at problem of adolescent (青春期的)sleep at Brown’s School of Medicine.
Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns(方式).
Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.
Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at night and sleep later in the morning. But it’s not just a matter of choice---their bodies are going through a change of sleep patterns.
All of this makes the transfer(迁移)from middle school to high school---which may start one hour earlier in the morning—all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the “sleep late, rise late” pattern, adolescents are up against difficulties when they try to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”
1.Carskadon suggests that high schools should not start classes so early in the morning because
_______.
A. it is really tough for parents to enforce bedtime
B. it is biologically difficult for students to rise early
C. students work so late at night that they can’t get up early
D. students are so lazy that they don’t like to go to school early
2.The underlined phrase nod off most probably means _______.
A. turn around B. agree with others C. fall asleep D. refuse to work
3.What might be a reason for the hard transfer from middle school to high school?
A. Adolescents depend more on their parents.
B. Adolescents have to choose their sleep patterns.
C. Adolescents sleep better than they did at childhood.
D. Adolescents need more sleep than they used to.
4.What is the passage mainly about?
A. Adolescent health care.
B. Problems in adolescent learning.
C. Adolescent sleep difficulties.
D. Changes in adolescent sleep needs and patterns.
九年级英语阅读理解中等难度题查看答案及解析
A Brown University sleep researcher has some advice for people who run high schools: Don’t start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce(确保) bedtime. Instead, it may be that biologically(生物学上)these sleepyhead(贪睡者)students aren’t used to the early hour.
“Maybe these kids are being asked to rise at the wrong time for their bodies,” says Mary Carskadon, a professor looking at problem of adolescent (青春期的)sleep at Brown’s School of Medicine.
Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns(方式).
Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.
Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at night and sleep later in the morning. But it’s not just a matter of choice---their bodies are going through a change of sleep patterns.
All of this makes the transfer(迁移)from middle school to high school---which may start one hour earlier in the morning----all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the “sleep late, rise late” pattern, adolescents are up against difficulties when they try to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”
1.Carskadon suggests that high schools should not start classes so early in the morning because _______.
A.it is really tough for parents to enforce bedtime
B.it is biologically difficult for students to rise early
C.students work so late at night that they can’t get up early
D.students are so lazy that they don’t like to go to school early
2.The underlined phrase nod off most probably means _______.
A.turn around B.agree with others C.fall asleep D.refuse to work
3.What might be a reason for the hard transfer from middle school to high school?
A.Adolescents depend more on their parents.
B.Adolescents have to choose their sleep patterns.
C.Adolescents sleep better than they did at childhood.
D.Adolescents need more sleep than they used to.
4.What is the test mainly about?
A.Adolescent health care.
B.Problems in adolescent learning.
C.Adolescent sleep difficulties.
D.Changes in adolescent sleep needs and patterns.
九年级英语阅读理解中等难度题查看答案及解析
___1.______ A new study by researchers at the University of Wales Institute has some interesting results.
The study from the University of Wales Institute examined the ability of 25 people aged 18-30. __2._____ In one task they had to remember a list of eight letters, which were dictated to them.
Participants(参与者)in the study were tested under three different conditions: in a quiet environment, while listening to music they liked, and while listening to music they didn’t like.___ 3._____ The background music seemed to make memorization more difficult. However, scientists also found that listening to music before doing the tests seemed to help concentration.
“Despite (尽管) describing their self-selected music as more pleasant, their performance was poor, just as it was when they listen to music they disliked,” explained one of the researchers. ____4._____
Another study seemed to further contradict (反驳) the idea that music could help with concentration. As a part of this research, university students were asked about their study habits. _____5.____ And those who do listen to music prefer the instrumental songs.
So, if you are studying for an exam, turn off your iPad!
根据材料内容, 将A—E五个句子填入文中空缺处, 使短文内容完整、正确,并将其标号填写在下面题后的横线上。
A. So, even if you’re listening to music you like, it’ll still influence your work.
B. The participants generally did better whey they were working in silence.
C. They were asked to remember information while listening to various sounds.
D. The researchers found that the majority of students prefer to work without music.
E. Can music help you concentrate at work?
九年级英语其他题中等难度题查看答案及解析
--- Let’s go to Mr. Zhang for some advice.
--- He be at home because he has gone to Shanghai for a holiday.
A. may B. might C. can’t D. must
九年级英语单项填空中等难度题查看答案及解析
Have you ever had trouble sleeping in a new place?
Lots of people do. And now researchers from Brown University in Rhode Island think they know why. They found that one-half of the brain "remains more awake" than the other half when people are trying to sleep in a new place.
The sleep findings were reported in Current Biology by Brown University. In their report, the researchers said many people report they have a harder time sleeping the first night at a hotel or other places outside their home. They call it "first-night influence". "In Japan they say, 'If you change your bed, you can't sleep,'" said Yuka Sasaki, one of the report's writers. "You don't sleep very well in a new place. We all know about it."
The researchers measured brain waves (测量脑波) for 35 volunteers over two nights in a laboratory. The two nights were a week apart (间隔). They found during the first night the left half of the brain was more active than the right half. This was during the first deep-sleep period, the researchers said.
Sasaki said a lot of questions remain.
Researchers did not keep measuring brain waves all night long. So, they don't know if the left half keeps "watch" all night, or whether it "works in shifts (轮换) with the right half later in the night". They also do not know why the brain activity, at least during the first period of deep sleep, is always on the left half.
For some, this research may be calming. It is good to know that our brain is "looking out for us" in a new place. But it may not help with sleep. That brain activity, at least according to this new research, makes it harder to get the sleep people need to wake up well rested in the morning.
根据材料内容选择最佳答案,并将其标号填入题前括号内。
1. How many times did the researchers measure brain waves for 35 volunteers?
A. Once. B. Twice. C. Three times. D. Four times.
2. The researchers found during the first deep-sleep period.
A. the brain waves remained the same
B. the brain activity helped with sleep
C. the right half of the brain kept "watch"
D. the left half of the brain was more active
3. Which of the following is one of the questions that remain?
A. Whether the new bed keeps you from sleeping.
B. How you have trouble sleeping in a new place.
C. Why the brain activity is always on the left half.
D. What people can do when they can't sleep well.
4.The underlined word "calming" has the closest meaning to" ".
A. pleasing B. different C. serious D. strange
5.What is the text mainly about?
A. What we will have to do to sleep well.
B. How researchers measure brain waves.
C. Who doesn't sleep well in a new place.
D. Why it's harder to sleep in a new place.
九年级英语阅读理解中等难度题查看答案及解析
--- Let’s go to Mr. Zhang for some advice.
--- He ________ at home because he has gone to Shanghai for a holiday.
A. may be B. must be
C. can’t be D. mustn’t be
九年级英语单项填空中等难度题查看答案及解析
根据句意,用所给单词的适当形式填空。
1.Thank you for__________help and useful advice.
2.Beijing has some places of interest________the Great Wall,the summer palace and so on.
3.I am looking forward to _________the top of Mount.Tai.
4.We are going hiking to enjoy the__________ of nature next week.
5.My pet dog bring me much_________,and it always makes me laugh.
6.After a long talk they both reached a(an) _________about the event.
7.If I was you,I would refuse his_________,because he is rude to us.
8.Please follow me,it’s easy to get_________ in the forest.
9.Today is his_________birthday.
10.Have another try or you won’t________.
九年级英语选词填空中等难度题查看答案及解析
I have a ______ frienD. He has lived in the _____ island for half a year to do some research.
A. close; alone B. close; lonely
C. closed; alone D. closed; lonely
九年级英语单项填空中等难度题查看答案及解析
I have a ______ friend. He has lived in the _____ island for half a year to do some research.
A. close; alone B. close; lonely
C. closed; alone D. closed; lonely
九年级英语单项填空简单题查看答案及解析