Sleeping in on Saturday after a few weeks of too little shuteye may feel refreshing, but it can give a false sense of security. New research shows long-term sleep loss cannot be cured that easily. Sci 题目和参考答案——青夏教育精英家教网—

题目内容

Sleeping in on Saturday after a few weeks of too little shuteye may feel refreshing, but it can give a false sense of security.

New research shows long-term sleep loss cannot be cured that easily. Scientists researched the effects of short- and long-term sleep loss and found that those who suffer long-term sleep loss may function normally soon after waking up, but experience steadily slower reaction times as the day goes by, even if they had tried to catch up the previous night.

The research has important safety significances in an increasingly busy society, not just for shift-workers but for the roughly one in six Americans who regularly get six hours or less of sleep a night.

“We know that staying awake 24 hours without sleep will affect your performance to do all sorts of things, and this effect equals to drinking too much when driving,” said lead researcher Dr. Daniel Cohen of Boston’s Brigham and Women’s Hospital. But when those who suffer long-term sleep loss become all-nighters, “the harm is increased ten times,” Cohen said.

The National Institutes of Health says adults need seven hours to nine hours of sleep for good health. Regularly getting too little sleep increases the risk of health problems, including memory impairment and a weakened immune system. More immediately, too little sleep affects reaction times; sleepiness is to blame for car crashes and other accidents.

It has critically important complicated and unexpected results for anyone who works “crazy hours” and thinks they are performing fine with a few hours of weeknight sleep, said Harris, director at New York’s Montefiore Medical Center. “Don’t think you can just bank up your sleep on the weekend, because it doesn’t work that way,” he warned.

The text mainly advises people ______.

A. to sleep more time B. to sleep in on Saturday

C. to sleep scientifically D. to sleep little on weekend

People with long-term sleep loss ______.

A. are quicker in thinking B. may feel refreshed soon after waking up

C. are surely energetic D. can have a strong sense of security

What can we learn from the text?

A. Most of the Americans get six hours or less of sleep a night.

B. Staying up is worse for those who suffer long-term sleep loss.

C. Traffic accidents have little to do with sleepiness.

D. One in six Americans are all-nighters.

Which of the following is the immediate effect of long-term sleep loss?

A. Health problems B. Immune system

C. Reaction times D. Memory impairment

The underlined phrase “bank up” in the last paragraph most probably means ____.

A. pile up B. pick up C. add up D. build up

【小题1】C

【小题2】B

【小题3】B

【小题4】C

【小题5】A

解析:

略

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短文改错
This afternoon I went to see my grandfather by a bus. It was very
crowded and I had to stand. Besides me there was a woman held a little boy
in her arms. In front of her, a young man occupies two seats, pretending to be
sleeping. I heard the little boy curious asking his mother, “What’s wrong with
the uncle?” I had thought if perhaps the woman would blame the man.
Beyond her expectations, the woman answered with a smile, “Be quiet. This
uncle must very tired because of hard work.” The young man must have
heard the word. His face turned red and offered one seat for the woman at once.

—I called you at 9 last night，but no one answered.

—Sorry，I ________ sleeping.I went to bed very early.

A．need have been? B．would have been

C．must have been? D．should have been

Like any good mother,when Karen found out that another baby was on the way,she did what she could to help her 3-year-old son,Michael,prepare for a new baby.Day after day,night after night,Michael sang to his mommy’s tummy(肚子).

Finally,Michael’s little sister was born.But she was in serious condition.With sirens (警报) howling in the night,the ambulance rushed the baby to St.Mary’s Hospital.The days inched by.The little girl became worse.The pediatric(儿科的) specialist told the parents to prepare for the worst.

Michael kept begging about singing to his sister,but kids are not allowed in pediatric department at St.Mary’s Hospital.Karen made up her mind to take Michael to see his sister.She dressed him in an oversized suit and marched him into the hospital.He looked like a walking laundry basket,but the head nurse recognized him as a child and shouted,“Get that kid out of here now!”Karen rose up strong,and the usually mild-mannered lady glared steel-eyed into the head nurse’s face.“He is not leaving until he sings to his sister!”

Karen towed Michael to his sister’s bedside.He gazed at the tiny baby losing the battle to live.And he began to sing.In the pure-hearted voice of a 3-year-old,Michael sang,“You are my sunshine,my only sunshine.You make me happy when skies are grey.”Instantly the baby girl responded.Her pulse rate became calm and steady.Her strained breathing became smoother.

“Keep on singing,Michael.”“The other night,dear,as I lay sleeping,I dreamed I help you in my arms…”Michael’s little sister relaxed as healing rest seemed to sweep over her.“Keep on singing,Michael.”Tears conquered the face of the nurse.“You are my sunshine, my only sunshine.Please don’t take my sunshine away.”

The next day—the very next day—the little girl was well enough to go home!

1.Which of the following can be the best title for the passage?

A.It’s Hard to Raise a Baby????????????? B.Mother’s Love???

C. The Miracle of a Brother’s Song??????? D.An Unforgettable Day

2.From Karen’s action in the first paragraph we know that??????? .

A.mothers often pay much attention to their newly-born babies

B.it often takes some time for a child to accept his/her newly-born brother or sister.

C.it is good for children to learn to sing songs to babies

D.mothers often tell their children how to look after their younger brothers or sisters

3.The underlined word“strained”means“???????? ”.

A.unnatural????????? B.exciting?????? C.deep????????? D.blocked

4.Which words can describe Michael?

A.Naughty and annoying.????????????? B.Strong and brave.

C.Active and careless.???????????????? D.Concerned and determined.

This afternoon I went to see my grandfather by a bus. It was very crowded and I had to stand. Besides me there was a woman held a little boyin her arms. In front of her, a young man occupies two seats, pretending to be sleeping. I heard the little boy curious asking his mother, “What’s wrong with the uncle?” I had thought if perhaps the woman would blame the man. Beyond her expectations, the woman answered with a smile, “Be quiet. This uncle must very tired because of hard work.” The young man must haveheard the word. His face turned red and offered one seat for the woman at once.

短文改错

This afternoon I went to see my grandfather by a bus. It was very

crowded and I had to stand. Besides me there was a woman held a little boy

in her arms. In front of her, a young man occupies two seats, pretending to be

sleeping. I heard the little boy curious asking his mother, “What’s wrong with

the uncle?” I had thought if perhaps the woman would blame the man.

Beyond her expectations, the woman answered with a smile, “Be quiet. This

uncle must very tired because of hard work.” The young man must have

heard the word. His face turned red and offered one seat for the woman at once.

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