解析：5.本文是一篇说明文,主要介绍了沉默在不同文化背景下的不同内涵。在有些时候,人们利用沉默来解决人们之间的冲突,而在有些时候沉默则被认为表示顽固或者是担忧。

细节理解题。根据文章首段首句The meaning of silence varies among cultural groups可知,作者认为沉默是有文化特性的。故选C。

6.细节理解题。根据第二段中 what may be implied is that the person wants the listener to consider what has been said before continuing 可知中国人认为谈话时人们的沉默是在思考谈话内容。故选A。

7.细节理解题。根据末段末句 A nurse who understands the healing value of silence can use this understanding to assist in the care of patients 可知,作者建议护士要利用沉默的好处来护理病人。故选D 。

8.主旨要义题。文章主要介绍了在不同文化背景下谈话期间的沉默的不同含义,由此判断B选项可以概括文章内容。故选B 。考点:社会生活类短文阅读。

　　Overweight seems to be a national trouble. Diets" books on dieting, dieting organizations, and advice from doctors and health professionals do not seem to be enough. Millions of people have turned to dangerous drugs or harmful diets to starve off their hunger.

The meat industry and the fast-food restaurants have more to do with America s weight problem than anything else. Each day we are filled with powerful TV and radio ads promoting(推介) the idea that it's perfectly OK to have bacon and eggs for breakfast, hamburgers and French fries for lunch, and fried chicken and French fries for supper.

Is there a healthy diet that people can use to lose weight and keep themselves slim and fit forever? There is indeed. But it requires removal of meat,fish,and milk products from the diet forever.

A healthy diet-and-exercise regimen(养生之道) is actually pretty simple. That is to cut meat, fish, and milk products out of the picture completely (and I do mean completely).

• Do not eat any meat,fish,eggs,or milk products. No cheese,no ice cream,no pizza,and no butter.

• Eat only low-fat, and low-sugar foods. Eat fruit (in reasonable amounts) for desserts.

• As much as possible,avoid drinks with caffeine,such as coffee,tea,or cola.

• Use soya drinks instead of milk. Soya drinks are high in protein and generally fairly low in fat.