议论文
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(大脑训练)involve engaging the brain in two or more challenging 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 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(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 answe资源难易程度:★★★★★★★★★★★★★★★
高考资源网版权所有 ©2005-2010
未经许可，盗用或转载本站资料者，本站将追究其法律责任！
