首页
登录
职称英语
Centuries ago, man discovered that removing moisture from food helps to pres
Centuries ago, man discovered that removing moisture from food helps to pres
游客
2024-08-19
4
管理
问题
Centuries ago, man discovered that removing moisture from food helps to preserve it, and that the easiest way to do this is to expose the food to sun and wind.
Fruit is sun-dried in Asia Minor, Greece, Spain and other Mediterranean countries, and also in California, South Africa and Australia. The methods used vary, but in general, the fruit is spread out on trays in drying yards in the hot sun. In order to prevent darkening, pears, peaches and apricots are exposed to the fumes of burning sulphur before drying. Plums for making prunes, and certain varieties of grapes for making raisins and currants, are dipped in an alkaline solution in order to crack the skins the fruit slightly and remove their wax coating, so increasing the rate of drying.
Nowadays most foods are dried mechanically. The conventional method of such dehydration is to put food in chambers through which hot hair is blown at temperatures of about 110℃ at entry to about 43℃ at exit. This is the usual method for drying such things as vegetables, minced meat, and fish.
Liquids Such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel cylinder or by spraying them into a chamber through which a current of hot air passes. In the first case, the dried material is scraped off the roller as a thin film which is then broken up into small, though still relatively coarse flakes. In the second process it falls to the bottom of the chamber as a fine powder. Where recognizable pieces of meat and vegetables are required, as in soup, the ingredients are dried separately and then mixed.
Dried foods take up less room and weigh less than the same food packed in cans or frozen, and they do not need to be stored in special conditions. For these reasons they are invaluable to climbers, explorers and soldiers in battle, who have little storage space. They are also popular with housewives because it takes so little time to cook them. Usually it is just a case of replacing the dried-out moisture with boiling water. [br] Dried foods are often used by ______, ______ and ______.
选项
答案
climbers, explorers, soldiers.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3726189.html
相关试题推荐
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Sofartherehavebeendiscoverednolimitstoman’scapacitytolearn.【76】F
Theschemewas______whenitwasdiscovereditwouldbeverycostly.A、resigned
随机试题
ThatLouiseJohannesisbelievedbymanycriticstobethegreatesttwentiet
GlobalMigration:AWorldEverMoreontheMoveGordonBrown’sr
[originaltext]W:Mr.Hiller,isthenumberofcomplaintsincreasingordecreasi
县级以上工商行政管理部门根据已经取得的违法嫌疑证据或者举报,对涉嫌侵犯他人注册商
通过问诊就可以作出明确诊断的疾病是()A.肺炎球菌性肺炎 B.风湿性心脏
多用于包隔离层,可增加衣层黏性、塑性和牢固性,并对片心起保护作用的是A:糖浆B
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
个体在解决问题过程中,思维沿着许多不同的方向扩展,使观念发散到各个有关方面,最
口腔科特有的诊疗环境给预防交叉感染增加了难度,其中最难解决的问题是A.看患者前后
防止噪声污染的最根本的措施是()。 A.从声源上降低噪声 B.
最新回复
(
0
)