We all know that certain oils are healthier than others, but your oil health goes beyond just the type.
The health of your oil can be related to how you use it too.
Each type of oil has what is called a "smoke point". The smoke point is the specific temperature at
which the oil starts to break down, or in more technical terms, its molecular structure begins to change.
These molecular changes result in changes in flavor, as well as changes in nutritional value-specifically,
the nutritional value of the oil starts to reduce, changing what once may have been considered an
especially healthy oil, like olive, into one that is unhealthy.
The higher an oil"s smoke point is, the higher the temperature of the oil can be.As a result, each type
of oil should be used for the cooking method that is most appropriate to its individual smoke point and
heat tolerance.Here is a quick guide for the next time you reach for your favorite oil.
Note that the above table represents oils that are refined (精炼的). Most oils we buy are refined.
Refine d oils tend to have much higher smoke points than when they are unrefined.They also differ in
nutrition and flavor.Unrefined oils are more nutritious and they tend to be much richer in flavor.
When it comes to extremely high heat cooking,always choose oils which are refined.
A. Drug overuse and its consequence B. The problem of drug overuse in America C. Benefits of medicine and its wise use D. Female drug overuse with reference to that of males E. Misuse of medicine among the young generation F. Improper use of medicine among senior citizens |
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For the people living in the Nile Basin, the river is their life.This 6,825 km waterway, whose watershed (流域) covers three million square kilometers, flows through mountains, woodlands, lakes and deserts.Its potential for fishing, tourism and shipping is great-but so are its challenges. Water shortage, already serious in Egypt and Sudan, will soon influence several other countries in the watershed as well.Today, about 160 million people depend on the Nile River for their living. Within the next 25 years, the district"s population is expected to double, adding to the demand brought about by growth in industry and agriculture.The frequent drought (干旱) adds to the urgency. Water quality is also a problem.Precious soil is washed out to sea.Wastes from industry and agriculture create pollution.Higher concentrations of salt influence irrigated soils.Waterborne diseases continue unchecked.In areas where it"s hot and damp, water hyacinths choke off lakes, dams and other sections of the river, making it difficult for fishing and other businesses to move forward. Native people along the narrow area of farmland have watched the sand move closer day by day.They"ve seen the river change course, and their only source (来源) of water thickened with mud.They"re very poor and have few choices. But a new program, the Nile Basin Initiative (NBI), is offering very practical assistance.The program is more than just a watermanagement project.It"s a plan for the social and economic development of a vast district: it concentrates on the needs of the poorest of the poor and the environment that supports them. These are whole ecosystem problems, calling for united solutions (解决办法). Half the Nile Basin"s countries are among the world"s poorest nations; yet, somehow, they must find the resources, skills and political will to overcome these challenges. |
1. What are the great challenges the Nile Basin faces? |
A. The development of shipping industry. B. Overfishing of native people. C. Water shortage and water quality. D. Increasing population and tourism. |
2. The underlined word "hyacinths" ( in Paragraph 3 ) refers to"________". |
A. animals B. plants C. rocks D. salts |
3. The program NBI is mainly aimed at ________. |
A. preventing water pollution B. changing the river course C. improving living conditions of the poor D. preventing land from becoming desert |
4. What would be the best title of this passage? |
A. People"s Life in Egypt and Sudan B. Frequent Drought in Egypt and Sudan C. The Poorest Countries in the Nile Basin D. The Ecosystem Problems in the Nile Basin |
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How to eat healthfully can be especially complex for working women who often have neither the desire nor the time to cook for themselves (or for anyone else ).Registered dietitian Barbara Morrissey suggests that a few simple rules can help. "Go for nutrient-dense foods,"she suggests,"foods that contain a multiple of nutrients. For example,select whole wheat bread as a breakfast food,rather than coffee cake. Or drink orange juice rather than orange drink,which contains only a small percentage of real juice-the rest is largely colored sugar water. You just can"t compare the value of these foods, the nutrient-dense ones are so superior,"she emphasizes. Morrissey believes that variety is not only the spice of life,it"s the foundation of a healthful diet. Diets which are based on one or two foods are not only almost impossible to keep up the strength,they can be very harmful, she says, because nutrients aren"t supplied in enough amounts or balance. According to Morrissey,trying to find a diet that can cure your illnesses,or make you superwoman is a fruitless search." As women,many of us are too concerned with staying thin,"she says,and "we believe that vitamins are some kind of magic cure to replace food." "We need carbohydrates,protein and fat-they are like the wood in the fireplace. The vitamins and minerals are like the match,the spark,for the fuel,"she explains." We need them all,but in a very different proportions(部分). And if the fuel isn"t there,the spark is useless." |
1.From the first paragraph we know that working women________. |
A.think cooking is especially complicated B.do not share the same views with registered dietitians C.are busy and not interested in cooking D.are likely to eat healthfully |
2.Orange juice is different from orange drink because________. |
A.it contains only a small percentage of real juice B.it is natural,nutritious and prepared from real oranges C.it is largely orange-colored sugar water D.it produces nothing but calories |
3.In Paragraph 4,"a fruitless search" means "____"._____ |
A.an effort with no results B.a search for a diet without fruits C.a research on fruitless diet D.a diet serving as medicine |
4.Many women take it for granted,according to the passage that________. |
A.a balanced diet can result in being fat B.staying thin and healthy are both possible C.lack of variety in diets leads to staying thin D.vitamins are some kind of substitutions(代替物)for food |
5. By saying "if the fuel isn"t there,the spark is useless",the author means "________". |
A.carbohydrates,protein and fat are enough to support a human life B.vitamins and minerals are almost of no value C.carbohydrates,protein and fat are as important as vitamins and minerals D.without carbohydrates,protein and fat,vitamins and minerals are of no use |