题目内容
potentially harmful long-term effects on the colon, a small study indicates.
In the study, UK researchers found that a protein-heavy, low-carb diet created certain changes in the colon
that could contribute to colon cancer risk The study itself does not show whether high-protein diets really raise
the risk of any colon diseases, but the findings raise that possibility.
Diets relatively high in protein and lower in carbs have been shown to help heavy people lose weight. "People
should not be discouraged from losing weight," Dr Flint said. However, he added, they should make sure that
any weight loss plan includes adequate amounts of fiber and a high protein intake over months to years might
have ill effects on the colon.
The findings are based on 17 overweight men who followed three short-term diets: a one-week menu plan
to keep their weight; a four-week high-protein diet with reasonable amounts of carbohydrates; and a four-week
high-protein diet low in carbs.
On average, the study found when the men were on the high-protein diets, they had higher levels of
substances known as N-nitroso compounds (亚硝基化合物) and other metabolites (代谢物) that have been
linked to cancer. And when they were on the high-protein, low-carb diet, they had lowered amounts of fiber-
originated compounds thought to be protective against cancer.
Exactly what those changes might mean for a person's health is not clear. But Flint said that the findings
suggest that people should be cautious about consuming too much protein and too little fiber over a long period.
In general, experts recommend that adults get about 28 grams of fiber per day-though it's not known whether
that's enough for someone on a high-protein weight-loss diet.
B. Take Care of Your Colon
C. How to Lose Weight
D. How to Protect against Cancer
B. intelligence
C. a habit
D. behaviour
B. lower cancer risks
C. harm your body
D. keep your figure
B. weight problems are hard to solve
C. it is better to follow a low-carb diet
D. people should be cautious to lose weight
B. introduce a scientific finding
C. describe a research process
D. talk about healthy diets
世纪百通主体课堂小学课时同步达标系列答案
世纪百通优练测系列答案
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 阅读理解. | ||||||||||||
| Advertising is a form of communication that uses all kinds of media, and is visible everywhere these days. Typical customers of advertising companies are other companies, or businessmen, who want to persuade potential customers to buy more of what they make or sell. But there are other kinds of customers. Some organizations spend large sums of money on advertising a political party or other group that sells what is not, strictly speaking, a product or service. Such non - profit organizations are not typical advertising customers, and they prefer ways of spreading knowledge, changing attitudes, and improving society. Many advertisements are designed to increase sales of products and services by either improving brand image or, in the case of non - profit organizations, expressing ideas. In order to achieve th~s, advertisements will often pass on truthful information while delivering their messages. Every major medium is a means of delivering these messages, including television, radio, cinema, magazines, newspapers, video games, the Internet and billboards (大幅广告牌). Advertising will usually be created and. placed by an advertising agency on behalf of company or other organization. Spending on advertising has increased greatly in recent years. In 2006, spending was estimated at $155 billion in the United States and $385 billion worldwide; the latter is expected to reach more than $500 billion by 2010. While advertising can be seen as a necessity for economic growth and social development, it is not without social costs. Advertisement emails and other forms of junk mail have become so popular that ~they have become a major burden to users of I nternet email services, as well as a financial burden on Internet email service providers.
| ||||||||||||