Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Researchers are finding that what you eat may interfere with cancer growth at various stages. For example, certain foods can block the chemicals that initate cancer. Antioxidants(抗氧化剂), found in some vitamins and minerals, can snuff out oxygen free radicls (氧自由基), substances that are thought to make cells more susceptible to cancer, and they can even repair some of the cellular damage that has been done. And some food—wheat bran(麦,糠) in particular—has been shown to shrink precancerous(癌症前期的) cells.
A recent review of 17 studies from 17 nations reveals that people who eat the most fruits and vegetables have about half the cancer raters of those who eat the least. In fact, some research suggests that frequent consumption of fruits and vegetables can cut the risk of lung cancer even in smokers.
One of the most stu
A. Right
B. Wrong
C. Not mentioned
The United States is a democracy, which means that the citizens run the government. Since we can’t all make the rules, we elect representatives--our president, vice-president, senators, congressmen, governors, and others who make the laws and govern our country based on the beliefs of the people. These elected officials help pass laws that reflect the interests of their constituents, the people who live within the areas they represent.
Since the right to choose these representatives-is in the hands of the people, it is very important that everyone in a community go to the polls to cast their ballots(投票). If only a few people vote, then the elected representatives may not truly represent the interests of the full community.
Some day you may disagree with a decision made by your governor, state and federal(联邦的) representatives, or the president. The best way to make your opinion known is to go to the polls and elect new officials whom you believe will better r
A. the government is elected by the citizens
B. the rules and laws are made by the people
C. what the president does is under permission of all the citizens
D. everyone has a right to make changes in its future
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