A
( 思维品质)
Searching the Internet may help middle-aged and older adults keep their memories sharp,US researchers said.
Researchers at the University of California,Los Angeles,studied people doing Web searches by recording their brain activity.
“What we saw was that people who had Internet experience used more of their brain during the search,”Dr.Gary Small,a UCLA expert on aging,said.“This suggests that just searching on the Internet may train the brain and that it may keep it active and healthy.”
“This is the first time that someone has simulated(模拟) an Internet search task while scanning the brain,”Small said.His team studied 24 normal volunteers between the ages of 55 and 76.Half were experienced in searching the Internet and the other half had no Web experience.However,the two groups were similar in age,gender and education.
Both groups were asked to do Internet searches and book reading tasks while their brain activity was monitored(监视).
“We found that in the book reading task,the visual cortex—the part of the brain that controls reading and language—was activated,”Small said.“In doing the Internet search task,there was much greater activity,but only in the Internet-savvy group.”
He said it appears that people who are familiar with the Internet can engage in a much deeper level of brain activity.Activities that keep the brain engaged can preserve brain health and thinking ability.Small thought Internet searches might be one of those activities.
21.Researchers when volunteers were doing Web searches.
A.studied the Internet
B.activated the brain
C.monitored the brain activity
D.recorded their memories
答案C
解析细节理解题。由第五段可知,当志愿者在网上搜索时,研究人员监控着他们的大脑活动。故选C项。
22.The two volunteer groups were .
A.of the same age B.similar in education
C.good at the computer D.book lovers
答案B
解析细节理解题。由第四段最后一句“However,thetwogroupsweresimilarinage,genderandeducation”可知,B项符合题意。A项使用了thesame,与原文similar不符。故选B项。
23.According to the passage,we can learn that .
A.searching the Web keeps the brain more engaged
B.reading books keeps the brain more engaged
C.watching TV keeps the brain more engaged
D.chatting online keeps the brain more engaged
答案A
解析细节理解题。由最后一段第一句话“...whoarefamiliarwiththeInternetcanengageinamuchdeeperlevelofbrainactivity”可知,搜索网页可以使大脑更活跃。故选A项。
24.What can we conclude from the last paragraph?
A.Web searching is good for the brain.
B.Web searching damages the brain.
C.Activities are good for the brain.
D.Activities damage the brain.
答案A
解析推理判断题。阅读最后一段可知,使大脑持续运转的活动能维持脑健康和思维能力,而搜索网页就是其中一种。故搜索网页对大脑有益。故选A项。
