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 (前額葉腦皮層). 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】

試題分析：“一心多用”往往會降低而不是提高效率，也會影響我們與別人的關(guān)系。

1.For many people, multitasking has become a way of life and even a key to success. ”可知，大腦有氧訓(xùn)練的目的是為他們更加高效（才能通向成功）。所以正確答案為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. ”（你可能已經(jīng)經(jīng)歷了前額葉皮層“休息”，如果你曾經(jīng)撥一個電話號碼，當(dāng)電話接通時你突然忘記你撥電話是找誰。）可知，正確答案為A.

3.However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.”可知，在同一時間內(nèi)嘗試兩個或更多的需要注意力的工作是，人們有時會犯錯。所以該題正確答案為D.

4.一心多用”往往會降低而不是提高效率，也會影響我們與別人的關(guān)系。所以，該題正確答案為C.

考點：說明文的閱讀