Question

Before refrigerators were invented, the next best thing was an ice box. But another way to keep food fresh is to use an evaporative cooler. A common design is a tall box with several shelves inside to hold the food. The shelves are pieces of metal with many small holes through them. The sides of the box are covered with pieces of thick cloth.
Containers of water are placed at the top and bottom of the cooler. The ends of each piece of cloth lie in the water so the cloth stays wet.
The cooler is put outdoors, but not in the sun. Air will pass through the wet cloth. The inside of the box will stay several degrees cooler than the outside air temperature. And this may be cool enough to keep foods fresh, at least for a short time.
Some foods can make you sick if they are stored in conditions that are not cold enough to prevent the growth of harmful organisms（微生物）. Freezing can keep some foods in good condition for months after the growing season, ____________________ if they are kept too cold.
Some fruits and vegetables must be stored at zero to four degrees Celsius. Any colder, and they might be damaged. Some foods need to be stored at four to eight degrees, and some need to be stored above eight 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（濕度）in Storage to be kept between eighty-five and ninety-five percent.
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.
小題1:What is the main idea of the text?（no more than 8 words）
____________________________________________________________
小題2:Complete the following statement with proper words.（no more than 3 words）
You would be ill if you eat some foods that are kept in such a hot place that more __________ grow.
小題3:Fill in the blank in Paragraph 4 with proper words.（no more than 5 words）
____________________________________________________________
小題4:Why should we wet fruits and vegetables before storage?（no more than 11 words）
____________________________________________________________
小題5:What does the word "this"（Line 2, Paragraph 6）probably refer to?（no more than 5 words）
____________________________________________________________

Answer 1

小題1:How to keep food fresh in coolers.
小題2:harmful organisms
小題3:Yet foods can be damaged
小題4:In order not to let them become dry. /Because most fruits and vegetables need the relative humidity in storage.
小題5:Wetting the fruits and vegetables.

試題分析：在冰箱發(fā)明之前人們是怎樣保鮮食物呢？在文中作者介紹了一種名為an evaporative cooler，即蒸發(fā)冷卻器的器皿。其中一種普通的設(shè)計就是一個內(nèi)置幾個金屬架子，而周圍都圍著厚布的高箱子。此外作者還介紹了這種冷卻器的具體使用方法。
小題1:文章開頭通過refrigerators、 an ice box.引出使食物保鮮的另一種方法，即another way to keep food fresh is to use an evaporative cooler.，然后文章圍繞cooler具體的結(jié)構(gòu)及使用方法展開行文，由此可知文章中心內(nèi)容是介紹如何利用冷藏器來使食物保鮮的，所以答案是 How to keep food fresh in coolers.
小題2:根據(jù)文章第四段Some foods can make you sick if they are stored in conditions that are not cold enough to prevent the growth of harmful organisms可知在溫暖環(huán)境下致病的有害微生物會大量繁殖，所以此處填harmful organisms。
小題3:根據(jù)下文內(nèi)容可知水果蔬菜以及有些食品都是有最佳儲存溫度的，溫度太低會使食物受到破壞，即Any colder, and they might be damaged. 由此可知，此空填Yet foods can be damaged
小題4:根據(jù)文章倒數(shù)第二段Wet the fruits and vegetables so they do not become too dry.可知在保存前把水果蔬菜弄濕為的是保持水分，答案為In order not to let them become dry. /Because most fruits and vegetables need the relative humidity in storage。
小題5:根據(jù)上文Wet the fruits and vegetables so they do not become too dry.可知此處this指代把水果弄濕這件事，所以答案填Wetting the fruits and vegetables.