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1、 议论文议论文The term “multitasking” originally referred to a computers ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises(大脑训练)involve engaging the brain in two or more challeng
2、ing activities at a time. Although checking email while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memo
3、ry loss.In order to multitask, the brain uses an area known as the prefrontal cortex(前额叶脑皮层). Brain scans of volunteers performing multiple tasks together show that as they shift from task to task, this front part of the brain actually takes a moment of rest between tasks. You may have experienced a
4、 prefrontal cortex “moment of rest” yourself if youve ever dialed(拨电话)a phone number and suddenly forgotten who you called when the line is answered. What probably occurred is that between the dialing and the answering, your mind shifted to another thought or task, and then took that “moment” to com
5、e back. Research has also shown that for many volunteers, job efficiency(效率)declines while multitasking, as compared to when they perform only one task at a time.Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people dont find it difficult to eat
6、and read the newspaper at the same time. However, when two or more attentionrequiring tasks are attempted at one time, people sometimes make mistakes.We often dont remember things as well when were trying to manage several details at the same time. Without mental focus, we may not pay enough attenti
7、on to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget peoples nameseven sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their email while on the phone with a fri
8、end, they may come off as absentminded or disinterested. It can also cause that person to miss or overlook key information being passed on to them. (2010浙江卷)1Why are some mental aerobic exercises designed to engage people in multitasking?ATo make them more productive.BTo reduce their stress and anxi
9、ety.CTo develop their communication skills.DTo help them perform daily tasks more easily.解析：事实细节题。第一段说， “执行多项任务”成为一种生活方式，甚至被看做成功的关键，但是很多时候，这样的行为使我们降低而不是提高效率。由此判断，大脑训练的初衷是为了让我们提高工作效率，因此选 A，其他选项的叙述不符合文章内容。答案：A2According to Paragraph 2, why may a person suddenly forget who he has called?AHe may have hi
10、s prefrontal cortex temporarily damaged.BHe is probably interrupted by another task.CHe is probably not very familiar with the person he has called.DHe may need a rest between dialing and speaking.解析：推理判断题。第二段分析该现象说，当大脑从一项工作转到另一项工作时就会出现在任务转换时大脑的“瞬间休息”现象，比如在拨电话号码与接电话的转换中，对方接了电话之后你的大脑从一种思维转到另一种思维，此时你就
11、会忘记了你是给谁打电话，由此判断，这种现象出现的原因是 B，他被另外一项工作给打断了。答案：B3People tend to make mistakes when_.Athey perform several challenging tasks at a timeBnew messages are processed one after anotherCtheir relationships with others are affectedDthe tasks require little thought解析：事实细节题。第三段最后说，当尝试同时进行两项或者更多的需要集中注意力工作时，我们就会
12、犯错误。由此判断选 A。答案：A4What is the main idea of the passage?AMultitasking has become a way of life.BMultitasking often leads to efficiency decline.CMultitasking exercises need to be improved.DMultitasking enables people to remember things better.解析：主旨大意题。随着现代生活节奏的加快，人们 很多时候要同时处理两项甚至更多项工作，但人脑不同于电脑，在不同工作转换的时候、大脑常会出现“瞬间休息”现象，此时我们就会出错，研究表明， “多项任务”行为方式会增加我们的压力与焦虑感，使我们的记忆出现瞬间消失，我们的工作效率会因此而降低。因此全文的主题是B， “多重任务”会降低我们的工作效率。答案：B
