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问题 单项选择题

患者，女性，因缺失，要求做固定修复检查：稳定，牙龈退缩，临床牙冠显长，咬合关系正常。牙龈缘清洁，无炎症。根据患者的情况，临床设计为金合金烤瓷桥

对于贵金属烤瓷桥的蜡型制作中错误的是（）

A．基牙冠面厚度不少于0.5mm

B．桥体与固位体之间的连接部位应适当加宽、加厚

C．桥体面颊舌径可恢复与缺失牙等宽

D．桥体面的远近中径可适当缩短

E．减少桥体面的接触面积

答案

参考答案：C

单项选择题

企业任务的陈述又称为企业宗旨的陈述，它揭示了企业要想成为什么样的组织和要服务于哪些顾客这样的远景内容。任务陈述是企业制定战略计划和分配企业资源的（）。

A、出发点

B、起点和基础

C、根本

D、前提
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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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