[单项选择] Infrared Scanning Technology

How do we get more young people to increase their consumption of iron-rich foods Many nutritionists are advocating the fortification of a number of foods. This may help, but I contend that we should also intensify our efforts in nutrition education among our young people. I simply do not believe the argument that it is futile (徒劳的) to try to change eating habits. Once an intelligent person--and this includes adolescents--understands the need for a healthy diet, I think he 6r she will act accordingly. As for specific actions: I suggest that blood hemoglobin (血红蛋白) should be checked as a routine part of a youngster’s yearly physical. It should contain at least 11 grams per 100 milliliters of blood for a girl and at least 12 grams for a boy. If it is any lower, the physician probably will prescribe an easily absorbed iron supplement.

Adolescents--and everyone else--should cut out highly processed foods
A. check blood hemoglobin yearly
B. be on a strictly vegetarian diet
C. lose weight
D. do some more studies on hemoglobin

[单项选择]

Infrared Scanning Technology

How do we get more young people to increase their consumption of iron-rich foods Many nutritionists are advocating the fortification of a number of foods. This may help, but I contend that we should also intensify our efforts in nutrition education among our young people. I simply do not believe the argument that it is futile (徒劳的) to try to change eating habits. Once an intelligent person--and this includes adolescents--understands the need for a healthy diet, I think he 6r she will act accordingly. As for specific actions: I suggest that blood hemoglobin (血红蛋白) should be checked as a routine part of a youngster’s yearly physical. It should contain at least 11 grams per 100 milliliters of blood for a girl and at least 12 grams for a boy. If it is any lower, the physician probably will prescribe an easily absorbed iron supplement.
Adolescents--and everyone else--should cut out highly proce
A. the importance of diet
B. the need of iron
C. adolescents’ eating habits
D. blood hemoglobin

[单项选择]Passage Four
How can we get rid of garbage Do we have enough energy sources to meet our future energy needs
These are two important questions that many people are asking today. Some people think that man might be able to solve both problems at the same time. They suggest using garbage as an energy source, and at the same time it can save the land to hold garbage.
For a long time, people buried garbage or dumped it on empty land. Now, empty land is scarce. But more and more garbage is produced each year. However, garbage can be a good fuel to use. The things in garbage do not look like coal, petroleum, or natural gas; but they are chemically similar to these fossil fuels. As we use up our fossil-fuel supplies, we might be able to use garbage as an energy source. Burning garbage is not a new idea. Some cities in Europe and the United States have been burning garbage for years. The heat that is produced by burning garbage is used to boil water. The steam th
A. The shortage of energy and air pollution.
B. The shortage of energy and the land to hold garbage.
C. Air pollution and the shortage of fossil fuel.
D. Air pollution and the shortage of land to hold garbag

[单项选择]How can we get rid of garbage Do we have enough energy sources to meet our future energy needs
These are two important questions that many people are asking today. Some people think that man might be able to solve both problems at the same time. They suggest using garbage as an energy source, and at the some time it can save the land to hold garbage.
For a long time, people buried garbage or dumped(倾倒) it on empty land. Now, empty land is scarce. But more and more garbage is produced each year. However, garbage can be a good fuel to use. The things in garbage do not look like coal, petroleum, or natural gas; but they are chemically similar to these fossil(化石) fuels. As we use up our fossil fuel supplies, we might be able to use garbage as an energy source.
Burning garbage is not a new idea. Some cities in Europe and the United States have been burning garbage for years. (78) The heat that is produced by burning garbage is used to boil water. The steam that is prod
A. About 2 million metric tons of garbage is burned in some power plants in Paris, France each year.
B. In a modem society, more and more garbage is produced each year.
C. Using garbage is a good way to solve the problem of energy shortage.
D. It will be too expensive to use garbage as an energy sourc