【单选题】Water From the beginning, water has furnished man with a source of food and a highway to travel upon. The first(51) arose where water was a dominant element in the environment, a challenge to man's in...
【单选题】Researchers at Cornell University have found that fewer nutrients are lost when food is cooked in microwave ovens. In the case of fruits and vegetables, for example, up to 50 percent less vitamin C is...