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Are you a morning person? You might not like the findings in this new research.
From a lack of air and drinking water to solar radiation, theoretical Mars pioneers face any number of potential obstacles to settling on the red planet. Now, scientists have found something else to add to the list: seriously messed-up biological clocks.
One day on Mars - which scientists refer to as the solar day, or“sol”- is 37 minutes longer than a day on Earth. A team of European scientists recently demonstrated why that could be a problem.
Circadian rhythms are the body’s natural cycles of rest and waking, which tend to follow roughly 24-hour light-dark cycles. These natural rhythms - which play a role in biological functions including brain wave activity and hormone production - can be interrupted by things like jet lag（时差）and night shift work.
For the study, the researchers compared mice with healthy, 24-hour circadian clocks to mice with a genetic change that caused them to have shorter, 20-hour circadian clocks. The mice with healthy biological clocks were more likely to survive and reproduce, while the mice with shorter biological clocks were more likely to die off.
What does this all have to do with space travel? Since the Martian sol is longer than a day on Earth, people with shorter circadian clocks could suffer from health problems as they try to adapt to the rotational speed of the red planet.
Unfortunately, the body is unlikely to adapt to the new conditions or“learn”to develop a longer clock. As Loudon explained,“Learning is not a likely option.”
In other words: Sorry, super-early risers - NASA might not want you for the next Mars mission.
1.From the passage, people can face the following troubles living on Mars EXCEPT ______.
A. absence of air B. a lot of fierce creatures
C. lack of drinking water D. messed-up biological clocks
2.According to scientists, how long does one day on Mars last?
A. 24 hours. B. 23 hours and 23 minutes.
C. 24 hours and 37 minutes. D. 12 hours and 37 minutes.
3.How did the researchers study what effect living on Mars has on sleep?
A. By comparing different mice. B. By analyzing computer data.
C. By experiments in spaceships. D. By observing and judging.
4.Life on Mars would seriously mess with your sleep because ________.
A. the brain wave activity will be interrupted
B. the body’s natural cycles can be shortened
C. hormone production will hurt biological functions
D. the Martian sol is longer than a day on Earth
高二英语阅读理解中等难度题查看答案及解析
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Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labor through your work you may say that you’re “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the morning. For others, it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues（独白）as: “Get up, John! You’ll be late for work again!” The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleiman believes. Maybe you’re sleepy in the evening but you must stay up late anyway. Counteract（打破）your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won’t change your cycle, but you’ll get up steam and work better at your low point.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble of searching for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharp hours.
1.If a person finds getting up early a problem, most probably____________.
A. he is a lazy person
B. he refuses to follow his own energy cycle
C. he is not sure when his energy is low
D. he is at his peak in the afternoon or evening
2.You are advised to rise with a yawn and stretch because it will____________.
A. help to keep your energy for the day’s work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
3.What should one do if he wants to work more efficiently at his low point in the morning
A. He should change his energy cycle.
B. He should overcome his laziness.
C. He should get up earlier than usual.
D. He should go to bed earlier.
高二英语阅读理解困难题查看答案及解析
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Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labor through your work you may say that you’re "hot". That's true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the morning. For others it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues as “Get up, John! You’ll be late for work again!” The possible explanation to the trouble is that John is at his temperature-and-energy-peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles each member of the family has.
You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleitman believes. Maybe you’re sleepy in the evening but you must stay up late anyway. Counteract your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won't change your cycle, but you'll get up steam and work better at your low point.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble of searching for clean clothes by laying them out the night before. When ever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharp hours.
1.What is the best title of the passage?
A．Change Your Habits B．Save Your Energy
C．Daily Energy Cycle D．Temperature-and-energy Peak
2.If a person finds getting up early a problem, most probably_______.
A．he is a lazy person
B．he refuses to follow his own energy cycle
C．lie is not sure when his energy is low
D．he is at his peak in the afternoon or evening
3.Which of the following may lead to family quarrels according to the passage?
A．Unawareness of energy cycles
B．Familiar monologues.
C．A change in a family member's energy cycle.
D．Attempts to control the energy cycle of other family members.
4.If one wants to work more efficiently at his low point in the morning, he should____________.
A．change his energy cycle B．overcome his laziness
C．get up earlier than usual D．go to bed earlier
高二英语阅读理解中等难度题查看答案及解析
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Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labor through your work you may say that you’re “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the morning. For others, it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues（独白）as: “Get up, John! You’ll be late for work again!” The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleiman believes. Maybe you’re sleepy in the evening but you must stay up late anyway. Counteract（打破）your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won’t change your cycle, but you’ll get up steam and work better at your low point.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble of searching for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharp hours.
1.If a person finds getting up early a problem, most probably ________.
A. he is a lazy person
B. he refuses to follow his own energy cycle
C. he is not sure when his energy is low
D. he is at his peak in the afternoon or evening
2.You are advised to rise with a yawn and stretch because it will ________.
A. help to keep your energy for the day’s work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
3.What should one do if he wants to work more efficiently at his low point in the morning?
A. He should change his energy cycle.
B. He should overcome his laziness.
C. He should get up earlier than usual.
D. He should go to bed earlier.
高二英语阅读理解中等难度题查看答案及解析
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Do you find getting up in the morning so difficult that it's painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labor through your work you may say that you're “hot”. That's true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak(高峰). For some people the peak comes before noon. For others it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues ( 自言自语 ) as: “Get up, John! You'll be late for work again!” The possible explanation to the trouble is that John is at his temperature-and- energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
You can't change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleitman believes. Maybe you're sleepy in the evening but feel you must stay up late anyway. Counteract ( 对抗 ) your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won't change your cycle, but you'll get up steam ( 鼓起干劲 ) and work better at your low point.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the troublesome search for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.
1.If a person finds getting up early a problem, most probably________.
A. he is a lazy person
B. he refuses to follow his own energy cycle
C. he is not sure when his energy is low
D.he is at his peak in the afternoon or evening
2.Which of the following may lead to family quarrels according to the passage?
A.Unawareness of energy cycles. B.Familiar monologues.
C.A change in a family member's energy cycle.
D.Attempts to control the energy cycle of other family members.
3.. If one wants to work more efficiently at his low point in the morning, he should________.
A.change his energy cycle B.overcome his laziness
C.get up earlier than usual D. go to bed earlier
4.Which of the following statements is NOT true?
A.Getting off to work with a minimum effort helps save one's energy.
B.Dr. Kleitman explains why people reach their peaks at different hours of day.
C.Habits help a person adapt to his own energy cycle.
D.Children have energy cycles, too.
高二英语阅读理解简单题查看答案及解析
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Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labor through your work you may say that you’re “hot”. That’s true. The time of day when you feel the most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues (自言自语) as John talks to himself: “Get up, John! You’ll be late for work again!” The possible explanation for the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late anyway. Adjust your cycle to some extent by staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won’t change your cycle, but you’ll get up steam (打起精神) and work better at your low point.
Begin with a slow start which saves your energy. Get up with a slow yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the troublesome search for clean clothes by laying them out the night before. Whenever possible, do usual work in the afternoon and spend time doing important work for your high peak hours.
1.According to Dr. Kleitman if you don’t want to get up in the morning ____________.
A. you must be a lazy person
B. you must catch a cold
C. your energy cycle must be low
D. you should stay in bed
2.Which of the following may lead to family quarrels according to the passage?
A. A change in a family member’s energy cycle.
B. Familiar monologues.
C. Unawareness of energy cycles.
D. Attempts to control the energy cycle of other family members.
3.If one wants to work better at his low point in the morning, he should ____________.
A. change his energy cycle
B. go to bed earlier
C. overcome his laziness
D. get up earlier than usual
4.You are advised to rise with a yawn and stretch because it will _________________.
A. help you to control your temper early in the day
B. help to keep your energy for the day’s work
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
高二英语阅读理解中等难度题查看答案及解析
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Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new ___36____. He has proved that everyone has a daily energy cycle.
During the hours when you labour through your work, you __37___ say that you’re “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is ___38____. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered __39___ this is so , but it leads to such familiar monologues （自言自语）__40___ “Get up , John ! You’ll be late for work again!” The ___41___ explanation to the trouble is that John is at his temperature—and —energy peak in the evening. Much family quarrelling ___42___ when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
You can’t change your ___43___, but you can make your life ___44___ it better. Habit can help. Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late ___45___. Counteract （打乱）your cycle to some extent by ___46___ staying up later than you want to . If your energy is ___47___ in the morning but you have an important job to do early in the day, ___48___ before your usual hour. This won’t change your cycle, but you’ll get up steam(打起精神) and work better ___49___.
Get off to a slow start ___50___ saves your energy. Get up with a yawn （呵欠）and ___51___ . Sit on the edge of the bed a minute before ___52____ on the floor. Avoid the ___53___ search for clean clothes by laying them out ___54___. Whenever possible , do routine （常规的）work in the afternoon and save tasks ___55____ more energy for your sharper hours .
1. A. impression B. explanation C. exploration D. translation
2. A. must B. should C. can D. may
3.A. at its bottom B. at its beginning C. at its end D. at its peak
4.A. why B. that C. whether D. whatever
5.A. as B. such as C. which D. like
6.A. steady B. occasional C. surprised D. possible
7.A. starts B. comes back C. ends D. turns around
8.A. life attitude B. energy cycle C. time table D. alarm o’clock
9. A. to do B. change C. fit D. to renew
10.A. anywhere B. no way C. anyway D. somewhere
11.A. sensitively B. especially C. carefully D. habitually
12.A. low B. high C. old D. new
13.A. go up B. rise C. lift D. raise
14. A. in your high spirit B. at the right time
C. at your low point D. in the same way
15.A. which B. whichever C. what D. whatever
16.A. express B. attend C. open D. stretch
17.A. putting your feet B. setting your foot
C. laying down your foot D. lying your feet
18.A. tired B. troublesome C. immediate D. dangerous
19.A. yesterday B. last night C. the night ago D. the night before
20.A. suggesting B. demanding C. requiring D. persuading
高二英语完型填空中等难度题查看答案及解析
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Do you find getting up in the morning so difficult that it's painful ? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labour through your work you may say that you're "hot". That's true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak . For some people the peak comes during the forenoon. For others it comes in the afternoon or evening No one has discovered why this is so , but it leads to such familiar monologues（自言自语） as : "Get up, John! You'll be late for work again !" The possible explanation to the trouble is that John is at his temperature-and -energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each
member of the family has.You can't change your energy cycle, but you can learn to make
your life fit it better. Habit can help, Dr. Kleitman believes . Maybe you're sleepy in the evening but feel you must stay up late anyway . Counteract（对抗/抵消）your cycle to some extent by habitually staying up later than you want to .If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won't change your cycle, but you'll get up steam and work better at your low point.Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch . Sit on the edge of the bed a minute before putting your feet on the floor . Avoid the troublesome search for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.
1.If you wants to work more efficiently at your how point in the morning, you should _____.
A. change his energy cycle B. overcome his laziness
C. get up earlier than usual D. go to bed earlier
2.You are advised to rise with a yawn and stretch because it will _____.
A. help to keep your energy for the day's work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
3.What’s the best title of the passage?
A. Change Your Habits B. Save Your Energy
C. Daily Energy Cycle D. Temperature- and-Energy Peak
4.The text is probably taken from a _________.
A. news report B. research paper C. medical textbook D. fashion journal
高二英语阅读理解中等难度题查看答案及解析
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“You are too selfish. It’s high time you that you are not the most important person in the world.” Peter said to his boss angrily.
A. realized B. realize C. will realize D. have realized]
高二英语单项填空中等难度题查看答案及解析
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“You are too selfish. It’s high time you that you are not the most important person in the world.” Peter said to his boss angrily.
A. realized B. realize C. will realize D. have realized
高二英语单项填空中等难度题查看答案及解析
member of the family has.