题目

The food we eat seems to have far-reaching effects on our health. Although science has made great steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures.  That food is related to illnesses is not a new discovery. In 1945, government researchers realized that carcinogenic 赤道是A.30°纬线B.90°纬线C.0°纬线D.20°纬线