化脓性关节炎后期关节已有破坏与增生，强直已不可避免时，最恰当的治疗方法是A．避免负重

在高速公路上行驶感觉疲劳时，应立即停车休息。

第三部分：阅读理解（共10小题；每小题2分，满分20分）

请认真阅读下列短文，从短文后所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

A

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 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, 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 group 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.”

56. The underlined word “them” in Paragraph 1 refers to ________.

A. feelings         B. minds         C. people        D. thoughts

57. Meditations 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

58. The study proves that ________.

A. meditation improves one’s health        B. brain activity can be recorded

C. human attention can be trained              D. mediators have a good sense of hearing

请论述水泵房管道的安装要求。

平键连接能传递的最大转矩为T，现要传递的转矩为1.5T，则应（）。

A．把键的工作长度增大到1.5倍

B．把键宽增大到1.5倍

C．把轴的半径增大到1.5倍

D．安装一对平键

下列施工场所中，照明电压不得超过12V的是（）。

A.地下车库

B.潮湿场所

C.金属容器内

D.人防工程