题目内容
information .
B. either
C. instead
D. though
Attention deficit（不足）hyperactivity（活动过度）disorder is known by the letters A．D．H D．Children with A．D．H．D．might have trouble paying attention．They might not seem to listen and might forget things．They might not be able to stay seated or play quietly．They might talk too much and act and speak without thinking about the results of their behavior．These are among the signs named on the web site of America’s Centers for Disease Control and Prevention．
Doctors usually identify the disorder in children．But experts say the behaviors often last into adulthood．Researchers have been looking for the cause or causes of attention deficit hyperactivity disorder．Now, a brain-imaging study offers more evidence that could lead to new ways to treat it．Researchers say they observed shortages in the brain's reward system in patients with A．D．H．D．The study found that levels of some proteins were lower than normal．Nora Volkow, director of the National Institute on Drug Abuse, says the lack of attention and self –control that mark A.B.H.D. could be caused by problem in the flow of dopamine（多巴胺）. She says people might have difficulty completing an activity if they cannot expect some kind of reward in return. Researchers studied the pathways on which dopamine travels and A.D.H.D. Doctor Volkow says the researchers then compared the pathways to those of 44 adults without the disorder. “There was a lower concentration of dopamine markers in the brain of individuals with A.D.H.D., specifically in the areas of the brain that are involved with reward and motivation. And the dopamine levels were directly linked to the severity, of the patient’s inattention she says.”
The study used brain images taken at Brookhaven National Laboratory in new York State. Gene-Jack Wang is chairman of the Brookdhaven medical department. He says the finding might also help explain why people with A.D.H.D.
are more likely to abuse drugs or overeat. He says they might be attempting to increase their dopamine levels to make up for the deficits in their reward system.
| Title | ●The finding of |
| The of Children with A.D.H.D. | ●They are lacking in . ●Perhaps they don’t seem to listen. ●Perhaps they are . ●Perhaps they can’t sit for or play quietly. ●They might talk too much and act and speak without the results of their behavior |
| The of A.D.H.D. | ●patients with A.D.H.D are of the brain’s reward. ●Levels of some proteins are lower than normal. ●Levels of dopamine are as well. |
| Reasons of abusing Drugs | ●They are trying to their dopamine. |
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
E
It is reported that today in China, 50% of people who write blogs do so as a personal diary and 83% use their blogs for sending messages to friends. It is also found that there is a strong East-West difference. In places like the US, blogs that offer information on news attract more readers but in China, blogs are more likely to be about sharing personal feelings.
It seems that bloggers can be divided into three types: IT bloggers, bloggers who record their ordinary feelings and media bloggers.
When blogging first started, the IT people had the technological advantage and they took the chance to put their thoughts on the web. Some of these IT people read their blogs.
The next wave of bloggers did not have any training as writes or in IT and wrote about normal daily life. Media bloggers, however, are trained writers, such as journalists and editors. When the many media bloggers showed up, the everyday blogs lost most of their readers. Media bloggers have the advantage of knowing how to communicate well through the written word.
However, the normal bloggers are still out there and increasing in number. It seems that blogging is the new way to express your feelings. People feel like the world is listening to, or rather reading, their problems, even if they are not .
1.What type of text is this?
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A．A blog. |
B．A diary. |
C．A news report. |
D．A school textbook. |
2.What is the passage’s subject?
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A．How many people in China blog. |
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B．How did blogging get started. |
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C．Different types of blogs and bloggers. |
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D．What media bloggers do. |
3.How does the writers feel about the subject?
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A．He/She feels strongly that blogging is a good thing. |
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B．He/She feels that there are lots of problems with blogging. |
|
C．We can’t tell since he/she is not a blogger. |
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D．We can’t tell since he/she is just reporting facts. |
4.What is the writer’s tone?
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A．Humorous and light-hearted. |
B．Serious and factual. |
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C．Conversational. |
D．Informal. |