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问题 单项选择题

下列各项财务指标中，( )既属于价值性指标，又属于动态指标。

A．财务净现值
B．静态投资回收期
C．财务内部收益率
D．投资利税率

答案

参考答案：A

解析：B属于时间性评价指标；C、D属于比率性指标。

填空题

（1）在密闭容器中有H2O(g) +C(s)  CO(g) + H2(g)反应，一定条件下达到平衡，①增大水蒸汽浓度，平衡向      反应方向移动（填“正”、“逆”或“不”下同），CO的浓度将    。（填“增大”、“减小”或“不变”下同）

②增加H2浓度平衡向    反应方向移动，CO的浓度将    。

（2）用注射器吸入少量NO2和N2O4的混合气体，发生如下反应：

2NO2（g）N2O4（g） 当活塞迅速向外拉时，平衡向    反应方向移动，气体的颜色先变_____（“浅”、“深”或“不变”下同），后变______；最终和最初相比，_____更深（填“前”或“后”）。
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单项选择题

In meditation (冥想), people sit quietly and focus their attention on their breath. As they breathe in and out, they attend to their feelings. As thoughts go through their minds, they let them go. Breathe. Let go. Breathe. Let go.
According to a recent study at the Insight Meditation Society in Barre, Massachusetts, three months of training in this kind of meditation causes a marked change in how the brain allocates (分配) attention. It appears that the ability to let go thoughts that come into mind frees the brain to attend to more rapidly changing things and events in the outside world. Expert mediators are better than other people at catching such fast-changing stimuli(刺激), like facial-expressions.
The study provides evidence for changes in the workings of the brain with mental training. People can learn and improve abilities of all sorts with practice, everything from driving to playing the piano. The study has shown that meditation is good for the brain. It appears to reduce pressure and promote a sense of well-being.
In an experiment, 17 volunteers with no meditation experience in the experimental group spent three months meditating 10 to 12 hours a day. A control group also with no meditation experience meditated for 20 minutes a day over the same period. Both groups were then given the tests with two numbers in a group of letters. As both groups looked for the numbers, their brain activity was recorded.
Everyone could catch the first number. But the brain recordings showed that the less experienced mediators tended to grasp the first number and hang onto it, so they missed the second number. Those with more experience gave less attention to the first number, as if letting it go, which led to an increased ability to grasp the second number. This shows that attention can change with practice.
Just ask Daniel Levision, who meditated for three months as part of the study. "I am a much better listener," he said, "I do not get lost in my own personal reaction to what people are saying. \

Meditators manage their daily tasks better because they ______.

A．are given less pressure

B．allocate their attention better

C．have more stimuli for life

D．practice them more frequently
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