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Some kids can't sit still for long. They have a hard time paying attention to just one thing. They're easily distracted(分神).They can get very impatient. They hate standing in line or waiting for their turn in a game or activity. They get bored pretty fast. They may also be impulsive—saying the first thing that comes to mind or interrupting someone else who's talking.?

For certain kids, this problem is so severe(严重) that doctors have a name for it: attention deficit hyperactivity disorder, or ADHD. Perhaps as many as 1 out of every 20 kids under the age of 18 have characteristics of ADHD. Often, these kids have trouble getting through school and face other difficulties later in life.?

Rizzo started developing the Virtual Classroom in 1999.He wanted to see if he could use it as a tool for testing and treating kids who have attention disorders.?

To diagnose(诊断) ADHD, doctors typically test patients by giving them tasks that require attention. As part of one classic test, you watch letters flashed on a computer screen. Every time you see the letter “A” followed by the letter “X”,you have to press the space bar. If you're paying close attention, you'll register all the times this combination occurs. If not, you'll miss some.?

The Virtual Classroom makes these tests more efficient, Rizzo says. In one experiment, he gave a group of kids the classic “A-X” test. Instead of looking at a computer screen in a doctor's office, though, the kids wore headsets that made it look like they were taking the test in a classroom.?

“Basically what we found,”Rizzo says,“is that, in 20 minutes of testing with virtual reality,?we? replicated(复制) a finding that usually requires a couple hours of standard testing with computer screens in the psychologist's office.”?

The first paragraph mainly tells us _______.?

A. how to find a patient with ADHD?

B. the behavior of some kids with ADHD?

C. kids with ADHD cannot sit still for a long time?

D. kids with ADHD are easily distracted

Perhaps as many as _______ kids have characteristics of ADHD. ?

A. one out of every twenty kids

B. five percent kids less than 18 years old?

C. one out of twenty kids at the age of 18

D. five percent kids more than age of 18

In the experiment, patients need to press the space bar, when _______.

A. see letters A following X  B. first see A then see B?

C. see letter X and A     D. see letters A followed by X

【小题1】B

【小题2】B

【小题3】D


解析:

【小题1】本题是主旨大意考查题。A、C、D三项只是其中的一个方面,不够全面。?

【小题2】细节题。答案在“Perhaps as many as 1 out of every 20 kids under the age of 18 have characteristics of ADHD.”一句中。?

【小题3】 细节题。答案在“Every time you see the letter ‘A’ followed by the letter ‘X’,you have to press the space bar.”一句中。?

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【小题5】
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【小题6】
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【小题7】
A.working B.speaking C.sleeping D.waking
【小题8】
A.happy B.aloneC.tired D.worried
【小题9】
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【小题14】
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【小题15】
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【小题17】
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