高考英语一轮复习课时作业12 unit 2 healthy(2)

[1] Some foods can make you sick if they are stored in conditions that are not cold enough to prevent the growth of harmful organisms. Freezing can keep some foodsin good condition for months after the growing season. Yet foods can be damaged if they are kept too cold. [2] The British development group Practical Action says the best way to prepare foods for storage is at harvest time while still in the field. Use a sharp knife and place the harvested items on a clean surface or directly into storage containers. Do not put them on the ground. Use clean water to remove dirt， and keep the water clean. Usually it is better not to remove outer leaves from fruits and vegetables before storage. ________， food can become dry. [3] Fruits and vegetables must be cool from field heat before they are put into storage. But cooling them in water can spread fungus(真菌)throughout the food. A better idea is to harvest foods either early or late in the day， then leave them to cool naturally. Some fruits and vegetables must be stored at 0 to 4 degrees Celsius. Any colder， and they might be damaged. Some foods need to be stored at 4 to 8 degrees， and some need to be stored above 8 degrees for best results. Wet the fruits and vegetables so they do not become too dry. The best time to do this is before storage. Cover the items in plastic once they reach the right “critical temperature” for storage. Most fruits and vegetables need the relative humidity(湿度) in storage to be kept between 85% and 95%. [4] Finally， leave space between the food containers and the walls of the cold storage area so air can flow. Keep the space clean. And try not to open the doors too often. 21．What is the main idea of the text？ (no more than 8 words) ________________________________________________________________________ 22．How should we set the temperature in the food containers？ (no more than 9 words) ________________________________________________________________________ 23．Fill in the blank in Paragraph 2 with proper words. (no more than 4 words) ________________________________________________________________________ 24．Can you tell one right method to store the vegetables and fruits？ (no more than 12 words) ________________________________________________________________________ 25．What does the word “this” (Line 10， Paragraph 3) probably refer to？ (no more than 6 words) ________________________________________________________________________课时作业(十二) Ⅰ.1.D suggest 后跟从句时需用虚拟语气，所以排除 A、C 两项；consult sb. about sth.意为“关于某事请教某人”，所以 D 项正确。