Question

1．Many people think it is safe to use a cell phone while they are driving．Yet Scores of studies suggest that real multitaskers-those who can carry out multiple （多个的） tasks equally well，make up just 2 percent of the population．More surprisingly，the so-called"supertaskers"actually have differently structured brains to the other 98 percent．
The brain areas that make supertaskers differ from the rest of the population are the same parts that are most different between humans and nonhuman primates （灵长类），according to David Strayer，director of the applied cognition lab at the University of Utah．Scientists are unsure of the reason why some brains are different．In fact，we could all benefit from doing just one task at once．
In most of us，scientists have located a"bottleneck in the brain"that may explain why we find it hard to do two things at once．
The problem appears to be caused by a logjam of nerve messages．Faced with two almost simultaneous （同时的） tasks less than 300 milliseconds apart，the brain's ability to deal with the second one slows down．The neural （神经的） response to the second task was postponed until the response to the first was completed．This means that with e-mails，phone calls，text messages and online social media all competing for our attention，often against a background of television，radio or music，our brains can reach information overload．
Scientists made the discovery after scanning the brains of volunteers attempting to multitask on a computer．The task was deliberately designed to involve the use of different senses and motorresponses．
Dr Rene Marois，one of the neuroscientists who carried out the experiment at Vanderbilt University in Nashville，Tennessee，said："Our research offers neurological evidence that the brain cannot effectively do two things at once．"The next step，the neuroscientists say，is finding out"why these areas cannot process two tasks at once．"
66．How many people can drive equally well while using a cell phone？C
A．Nobody．B．Everybody．C.2 in 100．D.98 in 100．
67．The researchers tried to find out the difference betweenBbrain structures．
A．different supertaskers'
B．supertaskers'and ordinary people's
C．humans'and nonhuman primates'
D．supertaskers'and nonhuman primates'
68．We can infer from the article that the brain takes 300 milliseconds toA．
A．make a neural response               B．get ready for a response
C．complete a task                      D．finish two tasks
69．If weD，our brains may reach information overload．
A．serf the Internet after listening to music
B．use a cell phone against a background of television
C．complete all kinds of tasks within the same day
D．have lots of tasks queuing for responses
70．From the dictionary explanations，choose one for the underlined word"motor"in Paragraph 5．C
A．having an engine
B．relating to vehicles with engines
C．relating to nerves that make muscles move （control body movement）
D．the part of a machine that makes it move．

Answer 1

分析 本文是一篇科普说明文．文章主要讲述了大多数人都不能在同一时间内完成两件甚至多件事情，只有极少数人可以做到同时完成多件事情，这样的人被称为"超级任务者"．本文分析了多数人不能同时完成两件甚至多件事情的原因，并试图找出"超级任务者"与普通人在大脑结构上的不同．

解答 CBADC
66．C　细节理解题．根据文章第一段第二句"…those who can carry out multiple （多个的） tasks equally well，make up just 2 per cent of the population．"可知，答案选C．
67．B　推理判断题．根据文章第一段最后一句"More surprisingly，the socalled‘supertaskers'actullay have differently structured brains to the other 98 percent．"并结合全文内容可知，研究者们试图找出超级任务者和普通人在大脑结构上的不同．
68．A  推理判断题．根据文章第四段第二、三句"Faced with two almost simultaneous （神经的） tasks less than 300 milliseconds apart…The neural （神经的） response to the second task was postponed until the response to the first was completed．"可知，大脑需要300毫秒的时间来作出神经反应．
69．D　细节理解题．根据文章第四段最后一句"This means that with emails…our brains can reach information overload．"可知，如果我们有很多的任务需要回复，我们的大脑就会达到信息超载．
70．C  词义猜测题．根据文章第五段画线单词所在句子并结合全文内容可知，画线单词motor应该是有关控制肌肉运动的神经．

点评 1、要想做好科普英语阅读理解题，同学们就要注意平时多读科普知识类文章，学习科普知识，积累常见的科普词汇，从根本上提高科普英语的阅读能力．
2、要熟悉科普类文章的结构特点．科普类文章一般由标题（Head line），导语（Introduction），背景（Back ground），主体（Main body）和结尾（End）五部分构成．标题是文章中心思想高度而又精辟的概括，但根据历年的高考情况来看，这类阅读理解材料一般不给标题，而要同学们选择标题．导语一般位于整篇文章的首段．背景交待一个事实的起因．主体则对导语概括的事实进行详细叙述，这一部分命题往往最多，因此，阅读时，同学们要把这部分作为重点．结尾往往也是中心思想的概括，并与导语相呼应，命题者常在此要设计一道推理判断题．　　
3、在进行推理判断时，同学们一定要以阅读材料所提供的科学事实为依据，同时所得出的结论还应符合基本的科普常识．