Genetically modified foods (GM foods), also known as genetically engineered foods (GE foods), or bioengineered foods, are foods produced from organisms that have had changes introduced into their DNA using the methods of __________________________.

Chinese who live in the humid regions prefer（ ）. A: hot foods B: preserved foods C: sweet foods D: salty foods

Genetically modified foods (GM foods), also known as genetically engineered foods (GE foods), or bioengineered foods are foods produced from organisms that have had changes introduced into their ________ using the methods of genetic engineering. A: RNA B: DNA C: Protein D: Chromosome

Most Americans______. A: buy genetically-engineered foods B: know the foods they buy are genetically engineered C: want genetically-modified foods to be clearly labeled D: eat genetically-modified foods

According to______ level, canned foods include low-acid foods, medium acidity foods, and high- acid foods.

Natural foods are the foods which___①___and which___②__ in farming today.

If the pH value of foods is in the range of 3.7 to 4.5, we can call this kind of foods as food. A: medium acidity B: low-acid foods C: high- acid foods D: None of the above

A diet high in animal foods and refined foods will cause diseases, and it damages (   ).

_______foods

It would be nice if we could improve on the list of foods to eat, foods to avoid, and foods to eat in ( ) . A: convention B: variation C: moderation D: accumulation