更多"Farm animals provide man with food "的相关试题:
[单项选择]
Farm animals provide man with food and material for clothing, leather and other products. Some, such as horses and oxen, provide transportation and power to pull machinery. Livestock gaze on about 40 percent of the United States land area.
Cattle provide meat, hides and dairy products. Beef and dairy cattle account for about a third of all farm income in the U.S. Farms in the Midwest and sprawling ranches in the West raise most of the country’s beef cattle. The main Dairy’ Belt in the U. S. extends through the Northern states from New England to Minnesota. Eastern dairy farmers in Minnesota, Wisconsin and Iowa sell most of their milk to companies that make butter, cheese and evaporated milk.
Hogs grow rapidly and provide meat and materials used to make many products. Hogs thrive on corn, and farmers in the Corn Belt of the Midwest raise more than two-third of U. S. hogs.
Sheep and goats supply man with meat, wool and skins for leather. They are
A. farming
B. leather only
C. natural balance
D. man’s need
[填空题]
If visitors provide food for the animals, this may upset the animals’
[填空题]If visitors provide food the animals, this may upset the animals’ ______.
[单项选择] Food and Cancer
Medical experts have suspected for many years that there is a strong link between what a person eats and cancer. They say a new study provides the first evidence that vitamins could reduce a person’s chance of developing cancer. A team of Chinese and American scientists did the study. They are from American National Cancer Institute and the Cancer Institute of the Chinese Academy of Medical Sciences in Beijing. The Journal of the National Cancer Institute published the results of the study. About thirty thousand people between the ages of 40 to 69 took part in the study. They were from the northern central Chinese area of Linxian. Most of them took vitamins and minerals every day for five years.
Linxian was chosen because the people there have an extremely high rate of cancer of stomach and esophagus. Researchers believe that fungus and molds in local foods may be partly responsible for the high cancer rate. Researchers divide
A. Right
B. Wrong
C. Not mentioned
