Question

The term “multitasking” originally referred to a computer’s 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 involve engaging the brain in two or more challenging activities at a time. Although checking e-mail 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 memory 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 prefrontal cortex “moment of rest” yourself if you’ve ever dialed a phone number and suddenly forgotten who you dialed when the line is answered. What probably occurred is that between the dialing and the answering, your mind shifted to anther thought or task, and then took that “moment” to come back. Research has also shown that for many volunteers, job efficiency 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 don’t find it difficult to eat and read the newspaper at the same time. However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.

We often don’t remember things as well when we’re trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people’s names—even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can also cause that person to miss or overlook key information being passed on to them.

1.Why are some mental aerobic exercises designed to engage people in multitasking?

A. To make them more productive.

B. To reduce their stress and anxiety.

C. To develop their communication skills.

D. To help them perform daily tasks more easily.

2.According to Paragraph 2, why may a person suddenly forget who he has called?

A. He is probably interrupted by another task.

B. He may need a rest between dialing and speaking.

C. He may leave his prefrontal cortex temporarily damaged.

D. He is probably not very familiar with the person he has called.

3.People tend to make mistakes when _______.

A. the tasks require little thought

B. their relationships with others are affected

C. new messages are processed one after another

D. they perform several challenging tasks at a time

4.What is the main idea of the passage?

A. Multitasking has become a way of life.

B. Multitasking exercises need to be improved.

C. Multitasking often leads to efficiency decline.

D. Multitasking enables people to remember things better.

 

Answer 1

1.A

2.A

3.D

4.C

【解析】

试题分析：“一心多用”往往会降低而不是提高效率，也会影响我们与别人的关系。

1.For many people, multitasking has become a way of life and even a key to success. ”可知，大脑有氧训练的目的是为他们更加高效（才能通向成功）。所以正确答案为A.

2. You may have experienced a prefrontal cortex “moment of rest” yourself if you’ve ever dialed a phone number and suddenly forgotten who you dialed when the line is answered. ”（你可能已经经历了前额叶皮层“休息”，如果你曾经拨一个电话号码，当电话接通时你突然忘记你拨电话是找谁。）可知，正确答案为A.

3.However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.”可知，在同一时间内尝试两个或更多的需要注意力的工作是，人们有时会犯错。所以该题正确答案为D.

4.一心多用”往往会降低而不是提高效率，也会影响我们与别人的关系。所以，该题正确答案为C.

考点：说明文的阅读