The purpose of using chemicals and fertilizers is to increase the quality of foods.
举一反三
- 1. Natural foods are rich inessential ____①____and ___②___.2. The use of chemicals and fertilizers is to increase the __③_not the _④___of foods.
- To use chemicals and fertilizers means ______. A: to increase the amount of foods B: to increase the quality of foods C: to increase the amount and quality of foods D: to increase essential vitamins and minerals
- In a linear regulator, the purpose of using the power transistor is to ( ). A: Increase output voltage B: Increase output current
- 43. According to the author, the use of chemicals and fertilizers ______.
- According to______ level, canned foods include low-acid foods, medium acidity foods, and high- acid foods.