题目内容

A desktop, together with 100 DVDs, ________ to the kindergarten as a present．

A.
has been offered
B.
have been offered
C.
has offered
D.
have offered

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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 patterns 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 conics to trying to be up by 5 or 6 a.m. for a 7:30 a.m. first hell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”

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

The underlined phrase “nod off” most probably means “ _______”.

A. turn around B. agree with others C. fall asleep D. refuse to work

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.

What is the test mainly about?

A. Adolescent heath care. B. Problems in adolescent learning.

C. Adolescent sleep difficulties. D. Changes in adolescent sleep needs and patterns.

See a cell phone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting "print" on your computer.
You might find it hard to believe that you could actually "print" an object like you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays (喷) ink onto paper line by line, modern 3-D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.
Instead of ink, the materials the 3-D printer uses are mainly plastic, resin (树脂)and certain metals. The thinner each layer is --- from a millimeter to less than the width of a hair --- the smoother and finer the object will be.
This may sound like a completely new technology, but the truth is that 3-D printing has been around since the late 1980s. Back then, it was hardly affordable for most people, so few knew about it.
Last year, though, saw a big change in the 3-D printing industry--- printers became much cheaper. For example, 10 years ago a desktop 3-D printer might have cost £20,000 (200,000 yuan), while now they cost only about £ 1,000, according to the BBC.
Taken out of the factory and introduced to more diverse and common uses, 3-D printing can create just about anything you can think of ---flutes (笛子), bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3-D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.
However, as 3-D printing becomes more common, it may bring about certain problems --- such as piracy(盗版). "Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3-D printer, who will visit a retail (零售的) store again?" an expert in 3-D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3-D printer to print out a fully functioning gun?
【小题1】According to the article, in the future, the 3-D printing technology will ___.

A．enable people to make better purchases online

B．be applied as widely in our daily lives as computers

C．change the way we make many products

D．shorten the time it takes for people to get what they buy online

【小题2】What was the big event happening in the 3-D printing industry last year?

A．The 3-D printing technology was taken out ofthe factory.

B．The 3-D printer became more affordable forconsumers.

C．The 3-D printer was used for medical treatmentfor the first time.

D．3-D printing technology began to be used invarious fields.

【小题3】How is the last paragraph developed?

A．By analyzing a cause and an effect.	B．By making comparisons.
C．By giving examples.	D．By presenting research findings.

【小题4】What is the best title of the passage?

A．Printing out everything	B．Technology in the future
C．Online shopping disappearing	D．Great demand for 3-D printers

I got interested in the idea of standing desks about a year ago. The health advantages of standing instead of sitting for eight hours a day are clear, so when the company Ergotron invited me to review their WorkFit C-Mod Dual Desk, I jumped out of my chair---really.

After several hours putting the desk together, I finally got to try it out. The standing desk had a desktop that I could use for writing.

At first I absolutely loved it. Standing during the day instead of sitting was fantastic. Although I felt more tired after all that standing during the day, I knew the health benefits were worth the slight discomfort. However, after the initial novelty (新奇)of the desk wore off, I realized that I could not use it in the long term.

It was just not practical. While using the desk for a month , I could definitely foresee problems arising from using it full time.

I enjoy having a lot of things on my desk. The standing desk just did not have enough room for all of my things.

I can easily foresee awkward situations when I put that desk in an office space. When someone comes into your office, does your guest have to stand as well? If you office is big enough, maybe you have room for two chairs for you and a visitor, which is great. Yet for the ordinary worker in a small office, the standing desk creates a very awkward situation.

Additionally, the amount of money I would have to spend to replace my current workspace with a standing desk was another issue. The desks I have looked at were highly expensive.

Yes, spending the day standing can offset(抵消) many of the negative effects of too much sitting, but we humans are designed for movement. Through activity changes like taking the stairs instead of the elevator, you can easily increase the time you spend on your feet. Best of all, those options are completely free.

1.When the author was asked to try the standing desk out, he was ____.

A．excited B．surprised C．unhappy D．uninterested

2.When first using the standing desk, the author ___.

A．thought it was boring B．thought it was wonderful

C．felt less tired than usual D．felt quite uncomfortable

3.According to the author, a standing desk ____.

A．takes up too much space B．is suitable for long-term use

C．is cheaper than traditional desks D．is impractical though good for health

4.What does the author mainly tell us in the text?

A．How to use the standing desk. B．What he does during the workday.

C．His opinion on the standing desk. D．The advantage of the standing desk.

You might find it hard to believe that you could actually "print" an object like you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays (喷) ink onto paper line by line, modern 3-D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.

Instead of ink, the materials the 3-D printer uses are mainly plastic, resin (树脂)and certain metals. The thinner each layer is --- from a millimeter to less than the width of a hair --- the smoother and finer the object will be.

This may sound like a completely new technology, but the truth is that 3-D printing has been around since the late 1980s. Back then, it was hardly affordable for most people, so few knew about it.

Last year, though, saw a big change in the 3-D printing industry--- printers became much cheaper. For example, 10 years ago a desktop 3-D printer might have cost £20,000 (200,000 yuan), while now they cost only about £ 1,000, according to the BBC.

Taken out of the factory and introduced to more diverse and common uses, 3-D printing can create just about anything you can think of ---flutes (笛子), bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3-D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.

However, as 3-D printing becomes more common, it may bring about certain problems --- such as piracy(盗版). "Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3-D printer, who will visit a retail (零售的) store again?" an expert in 3-D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3-D printer to print out a fully functioning gun?

1.According to the article, in the future, the 3-D printing technology will ___.

A．enable people to make better purchases online

B．be applied as widely in our daily lives as computers

C．change the way we make many products

D．shorten the time it takes for people to get what they buy online

2.What was the big event happening in the 3-D printing industry last year?

A．The 3-D printing technology was taken out ofthe factory.

B．The 3-D printer became more affordable forconsumers.

C．The 3-D printer was used for medical treatmentfor the first time.

D．3-D printing technology began to be used invarious fields.

3.How is the last paragraph developed?

A．By analyzing a cause and an effect. B．By making comparisons.

C．By giving examples. D．By presenting research findings.

4.What is the best title of the passage?

A．Printing out everything B．Technology in the future

C．Online shopping disappearing D．Great demand for 3-D printers

—A desktop, together with 100 DVDs, _____ to the kindergarten as a present.

A. has been offered B. have been offered C. has offered D. have offered

A desktop, together with 100 DVDs, ________ to the kindergarten as a present．

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