正确答案: C

百万农奴解放

题目：2009年3月28日，西藏自治区隆重集会，纪念第一个“西藏 纪念日”。

解析：C

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举一反三的答案和解析：

[单选题]This text is most probably taken from_

a newspaper report

[单选题]George is going to talk about the geography of his country, but I’d rather he_______ more on its culture.

focused

[单选题]苏铁(Cycas revoluta)和银杏的生活史都有游动精子出现，说明它们是裸子植物的原始类型。( )

正确

[单选题]薄荷为唇形科植物，可制高级香料和药品，其( )含薄荷油。

全草

[单选题]裸藻细胞大多只由原生质体组成。( )

正确

[单选题]

Trembling

[单选题]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 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). Brian 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 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 (效率) declines while multitasking, as compared to when they perform. only one task at a time.

To make them more productive.

解析：解析：推理判断题。根据第一段的内容可知，作者提出：“In fact, some excellent mental aerobic exercises (大脑训练) involve engaging the brain in two or more challenging activities at a time.”，之后用although引出转折，这种训练有时并不能productive。所以选择A。有部分人认为这种大脑的训练能够帮助他们高效的工作。