It’s true that teens don’t get enough sleep, but changing the school starting time would have a chaotic effect and throw everyone off balance.

Scientists have shown that teens are more active later at night than children and adults, so most teens are probably staying up later for whatever reasons. The researchers measured the presence of the sleep- promoting hormone in teenagers' saliva（唾液）at different times of the day. They learned that the hormone（荷爾蒙）levels rise later at night than they do in children than adults and remain at a higher level later in the morning. Measuring the hormone in the saliva is a good way to show that most teens have sleep problems, but changing schools schedules isn’t the best way to do to fix this. Most people arguing against changing school schedules would say that it would only cause teens to stay up and wake up later, thus leaving them with the same problem.

The biggest problem schools would come across from changing their schedules would be the after school and job conflicts students and teacher would meet. Teachers reported that students were more alert, and research showed that after-school sports and jobs would suffer. Students in that area might have been able to deal with less time for jobs and sports somehow, but some of them have practice and earlier plans that would become conflicted if this change were to occur. Most students rarely have time to play a sport and do homework before 9 or 10 o'clock. Opening schools later may have worked for some areas, but the reality is often very different.

 

63. The meaning of the underlined word "chaotic "（in the 1st paragraph）is close to_______.

A. positive                B. apparent                   C. negative                   D. definite

64. Most teens have sleep problems because ________.

A. they are more active than children and adults

B. school work takes up most of their time

C. their hormone levels are higher later at night

D. they probably like staying up for no reasons

65. Which of the following is TURE according to the passage?

A. There are many conflicts between students and teachers

B. Some of the teachers have practice and earlier plans

C. Most students are able to do sport and homework before 9:00

D. Ways to solve students' sleep problems depend from area to area

66. The passage mainly develops by ________.

A. giving reasons                B. showing examples

C. presenting questions        D. offering solutions

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

Seven Health Facts about Coffee

When you’re considering your morning coffee, here are some health facts to keep in mind:

1. Coffee Reduces Your Risk of Diabetes (糖尿病)

In a 2005 review of nine studies, researchers found that for those that drank four to six cups of coffee per day, versus only two or fewer, their risk for Type 2 diabetes decreased by almost 30 percent. The number decreased by 35 percent when people drank more than six cups per day. And if you’re picturing yourself running around the office with your eyes bugging out of your head, no worries because caffeinated and decaffeinated coffees provided much the same results.

2. Coffee Fights Free Radicals (自由基)

We often forget that coffee is actually a plant and like all plant foods, the coffee bean contains more than 1,000 naturally occurring substances called phytochemicals, which may help prevent disease. Many of these phytochemicals are antioxidants which protect the cells from damage from free radicals.

3. Coffee Improves Memory and Cognition

Researchers reported that volunteers who drank caffeinated coffee in the morning performed better than nondrinkers on tests that involved learning new information. Coffee can also improve cognitive function as we age. One study found that combining coffee with a sweet treat had an even bigger impact.

4. Coffee Can Increase Osteoporosis (骨質(zhì)疏松)

It’s true that coffee can cause the body to excrete calcium in urine. We don’t want the body to rid itself of calcium because this can lead to osteoporosis. According to The Diet Channel, about five milligrams of calcium is lost per every six ounces of coffee consumed. But these calcium losses can be counter balanced with two tablespoons of milk or yogurt per cup of coffee.

5. Coffee Causes Wrinkles

Even though coffee has antioxidants, if you drink too much of it, it can cause wrinkling of the skin. This is a result of dehydration (脫水) which is the worst thing for your skin. So when you’re drinking that morning cup or two, make sure that you’re pairing it with water. Even better, add one tablespoon of chia seeds to your water and let them sit for 30 minutes. The chia seeds keep you even more hydrated than regular water.

6. Coffee Can Actually Cause Weight Gain

The blood sugar changes that a caffeine high produces can contribute enormously to a strong desire for it, according to iVillage. Coffee is also socially connected to food. For example, we pair coffee with dessert or that morning powdered doughnut. Additionally, when we crash from our caffeine high that’s when we reach for all sorts of fatty snacks to keep us going.

7. Conventional Coffee Is Laden with Pesticides (殺蟲劑)

The coffee plant is one of the most heavily sprayed crops. It’s coated with chemicals, pesticides, and herbicides, nothing you’d want to be swallowing. If you do drink coffee, make sure that it’s the organic variety, free from assorted chemicals that leech into our ground water and can make us sick down the road.

If you switch to decaffeinated coffee, make sure the caffeine (咖啡因) is removed in a natural way without the use of chemicals to do it. Often times, conventional decaffeinated coffee has more chemicals than regular.

   If you want to decrease the risk of diabetes by 35%, you need to take at least _____ cups of     coffee every day.

    A. seven            B. six          C. five             D. four 

If you are a heavy drinker of coffee, a far better way to avoid wrinkling of your skin is to drink water _____.

    A. less than usual  B. regularly        C. with sugar       D. with chia seeds

   Which of the following statements is wrong?

    A. Adding two spoons of milk to a cup of coffee can prevent calcium losses.

    B. Decaffeinated coffee has different effects from caffeinated coffee as to diabetes.

    C. Many phytochemicals protect the cells from damage from free radicals.

    D. The organic variety of coffee plant is free from assorted chemicals.

   The author has a/an _____ attitude towards drinking of coffee.

    A. positive     B. negative     C. objective        D. imaginative

查看答案和解析>>

科目：高中英語 來源：2010年福建省四地六校聯(lián)考高二上學(xué)期第三次月考英語卷 題型：閱讀理解

A quarrel at home may result in your falling ill. Don’t laugh, it’s true. Family matters including living habits and even the way we speak have a big effect on our health, doctors say.
Wang Xiaoyu, a Senior 2 girl from Xichang, Sichuan Province, fainted (暈倒) in class when she heard her classmates quarrel at the top of their voices. Quarrels between her parents also put the girl into a coma. It is because she is suffering from depression (抑郁癥), caused by bad relations at home, doctors explained.
“We don’t get sick or stay well by ourselves,” says Dr Robert Ferrer from the US. Ferrer shows that family forces may explain up to a quarter of health problems, in his recent research. The genes you get from your family may cause illness. If one of your parents has a heart attack, your risk of being affected may double. But effects on health are not only written in our DNA.
Unrelated people who live under the same roof also get similar problems. Diet, lifestyle and environment affect our health, too. Ferrer’s research also found that if teenagers feel they are ignored or unimportant at home they are more likely to get sick.
We may never fully understand all the effects that families have on our health. But just as individual (個(gè)別的) problems can have effects on others, a small improvement can have big benefits, Ferrer said.
【小題1】 Which of the following can best explain why Wang Xiaoyu fainted in class?

A．Because her classmates often quarreled in class.
B．Because her parents used to quarrel.
C．Because of her depression caused by bad family relations.
D．Because her classmates shouted loudly at her.
【小題2】 According to Dr Ferrer, which of the following statements is TRUE?
A．We get sick or stay well by ourselves.
B．Only the genes we get from our family have a big effect on our health.
C．Our health has nothing to do with diet, lifestyle and environment.
D．Teenagers who are ignored at home get sick more easily than those who are not.
【小題3】 The underlined word “coma” in Paragraph2 probably means ________.
A．surpriseB．faintC．tirednessD．sadness
【小題4】The best title for this passage is ________.
A．Family relations.B．The reasons why we get sick.
C．Family---- another cause to healthD．A research about health.

查看答案和解析>>

科目：高中英語 來源：吉林省2010屆高三第九次模擬考試英語試題 題型：閱讀理解

“Your honor（法官大人）! Let me say a few words for myself．What they have told you is just not true．I was not trying to kill anyone, and it was hardly possible to try to kill three strong young men at the same time．I didn’t have anything to tell people that night and was quite alone．I didn’t know them and needn’t hate them．I was attacked by them, and I knocked one of them down, it’s true, but Iｗas made to do it, or I might be killed by them．I did this not because I hated the white men as they said．I just had to do so．While I was beaten in the dark street by the three men, a policeman came, caught me and took me here．I know why I was beaten．I have just moved into a house next to these three white men．I have felt that I am not welcome and I have tried to be quiet．I think, as an American, I have the right to choose where to live．I am guilty．What makes me guilty is my color opposite to theirs and I can’t enjoy justice．Yes, I am not guilty．This is all I want to say．Thank you, your honor.”

1．What color was the speaker?

A．Black．        B．White．       C．Brown．       D．Yellow.

2．Why did he speak for himself?

A．He wanted to live in the house next to the whites.

B．He wanted to have the right to choose where to live.

C．He wanted to show he was not guilty.

D．He wanted to show he didn’t hate the whites.

3．The speaker was caught because ____.

A．the policeman wanted to save him

B．he was black and was fighting with the whites

C．he killed the three men in a dark street

D．he lived in a house next to the whites

4．What’s the right order of the story?

a．The speaker said something for himself.

b．The three men said something.

c．The speaker knocked down one of the three men.

d．The speaker was beaten by the three men.

e．He was caught by the policeman.

f．The speaker moved into a house near the whites.

A．a(chǎn)-b-f-d-c-e      B．b-a-f-c-d-e         C．f-d-c-e-b-a    D．f-c-d-e-a-b

 

查看答案和解析>>

科目：高中英語 來源：2011年陜西省高一下學(xué)期期末考試英語題 題型：其他題

根據(jù)對話情景和內(nèi)容,從對話后所給的選項(xiàng)中選出能填入每一空白處的最佳選項(xiàng),并在答題卡上將該選項(xiàng)涂黑.選項(xiàng)中有兩個(gè)為多余選項(xiàng)。

---Mike, you’ve had a talk with your dad, haven’t you?

---_____1._____He insists I go to college first after I graduate from high school. He said I am too young to make a living.

---______2._____

---I told him I would like to work for some time before I could decide what I was going to do. I want to have some practical work experience.

---______3.______

---Well, he said it was not easy for a high school graduate to find a job.

---It’s true. More people are out of work these days.____ 4.______If she doesn’t agree with you, you can do a part-time job while studying.

---That’s right. I will talk with her. How about you?

---_____5.______

A.Talk with your mother and see what she thinks.

B.I am still thinking about it.

C.What did you say?

D.I think your mother will agree with you.

E.Yes, but my dad seemed not interested in it.

F.Did he agree with you?

G.My parents think of it as your father does.

 

查看答案和解析>>

科目：高中英語 來源：20102011江蘇海門中學(xué)高二下學(xué)期期中考試英語試題 題型：單項(xiàng)填空

It’s true that the old road is less direct and a bit longer. _______, they don’t like to take the new

   one.

    A. Though           B. Somehow          C. Therefore        D. Either

 

查看答案和解析>>

同步練習(xí)冊答案