题目内容
听力原文：M: Do you have to play that music so loud？ I've got a test tomorrow!
W: Sorry, I didn't realize you were studying.
Q: What will the woman probably do？
(17)
查看答案
搜索结果不匹配？点我反馈
更多问题
Cholesterol (胆因醇) and Heart Disease
Do you know your cholesterol level？ Many people don' t. A high level of cholesterol in the blood is an important risk factor for heart disease.
Some people say that the danger of heart disease is exaggerated. However, heart disease is a main cause of death in developed countries. Every year more than one million Americans have heart attacks, and half of them die. People with heart disease suffer chest pains that make simple activities, such as walking, shaving or taking a shower, difficult.
Research has proven that cholesterol levels are connected with heart disease. One project in Massachusetts has studied the same group of men and women since 1948. The researchers have found that the people who have high levels of cholesterol have more heart attacks.
A natural substance in the blood cholesterol comes from the liver. The amount of cholesterol is affected by diet and by physical qualities we inherit from out parents. One kind of cholesterol sticks fat to the walls of arteries (动脉), making them smaller and finally blocking them. It produces a condition called "hardening of the arteries' which causes heart attacks. With tiny cameras doctors can see blood circulating through the heart valves (瓣膜). Angiograms (血管造影) are x-rays of the heart arteries. They show fat deposits and blockages caused by high cholesterol.
Heart disease begins in children as young as 3 years old. It occurs earlier in boys than in girls. Nearly half of teenagers have some fat deposits on their artery walls. Heart disease develops faster if we have high cholesterol levels and also smoke. What is a safe level of cholesterol？ Adults have a high risk of heart attack ff their cholesterol level is about 240 milligrams per deciliter of blood. Below 200 is better. In the Massachusetts study, no one with a cholesterol level below 150 has ever had a heart attack. However, about half of American adults have cholesterol levels above 200.
To lower our cholesterol. level, we must change our eating habits. Anything that comes from an animal is high in fat and high in cholesterol. The American Heart Association National Cholesterol Education Program says that fat should be no more than 30 percent of our diet. Blood cholesterol levels start to fall after 2 to 3 weeks of following a low-cholesterol, low-fat diet. Dietary changes alone can result in a l0 percent reduction of the average person' s cholesterol level. Aerobic exercise helps, too. Artery blockage can be reduced by as much as 40 percent through changes in diet and amount of exercise.
We must educate everyone, including children in elementary schools. We must teach responsibility for their health through classes in nutrition and aerobic exercise. For example, the smart snack is fruit. Children must be served fruit in the school cafeteria, along with low-fat meals. Schools must send recipes (食谱) home with the children. Parents must include children in planning and preparing meals and shopping for food.
Adults, including persons over the age of 65, can lower their cholesterol by 30 to 40 per cent. It is never too late to change. One man began his health program when he was seventy three. By the time he was seventy-seven, he had lowered his arterial blockage from 50 percent to 13 percent and his cholesterol from 320 to 145 without drugs. He went on a vegetarian diet with only 10 percent fat, plus programs to reduce stress and get more exercise.
A low-cholesterol diet that cuts out most animal products and high-fat vegetables may be unfamiliar to people. The Heart Association says that people should use no added fat of any kind. Don' t fry food in oil. Cook it in water, vinegar, or vegetable water. Learn about grains and vegetables. Avoid egg yolks (the yellow part of the egg). Eat tomatoes, beans, low-fat
If the experiment succeeds or fails, it will provide us with valuable experience, which is
Section A
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
听力原文：M: Would you like to go to the movies with Lois and me on Friday？
W: I wish I could, but I'm having dinner at my brother's.
Q: What will the woman do on Friday？
(12)
It can be inferred from the passage that the author would disapprove of______.
微信支付 
支付宝支付