首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Centuries ago, man discovered that removing moisture from food helps to preserve it, and that the easiest way to do this is to e
Centuries ago, man discovered that removing moisture from food helps to preserve it, and that the easiest way to do this is to e
admin
2010-05-26
39
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. In this way the North American Indians produce pemmican (dried meat ground into powder and made into cakes), the Scandinavians make stock fish and the Arabs dried dates (枣) and "apricot leather" (杏干).
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 (硫磺) before drying. Plums (李子), for making prunes (梅干), and certain varieties of grapes for making raisins (葡萄干) and small dried grape cakes, are dipped in a salt solution in order to crack the skins of the fruit slightly and remove their wax coating, thus increasing the rate of drying.
Nowadays most foods are dried mechanically. The conventional method of such dehydration (脱水) is to put food in chambers through which hot air 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, cut meat, and fish.
Liquids such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel roller or by spraying them into a chamber through which a current of hot air passes. In the first case, the dried material is removed off the roller as a thin film which is then broken up into small, though still relatively coarse thin pieces. In the second process it falls to the bottom of the chamber as fine powder. Where recognizable pieces of meat and vegetables are added, as in soup, the ingredients are dried separately and then mixed.
What is the result of clipping plums or grapes in a salt solution before drying?____________
选项
答案
An increase in the rate of drying.
解析
转载请注明原文地址:https://jikaoti.com/ti/5RWFFFFM
0
大学英语四级
相关试题推荐
A、Topreserveforatest.B、Totellherifthenotesareaccurate.C、Tohelphimexplaintheinformationtohisroommate.D、Toh
Thereaxecockroaches(蟑螂)everywhereonEarthexcepttheplacesthataxecoveredwithice.Scientistshavediscoveredabout3,500
Thereaxecockroaches(蟑螂)everywhereonEarthexcepttheplacesthataxecoveredwithice.Scientistshavediscoveredabout3,500
Thereaxecockroaches(蟑螂)everywhereonEarthexcepttheplacesthataxecoveredwithice.Scientistshavediscoveredabout3,500
TheVikings’VoyagetoEternitySincetheMerovingianAge,duringthepostRomaneraofthe6th7thcenturiesAD,Norsemenhav
TheVikings’VoyagetoEternitySincetheMerovingianAge,duringthepostRomaneraofthe6th7thcenturiesAD,Norsemenhav
TheVikings’VoyagetoEternitySincetheMerovingianAge,duringthepostRomaneraofthe6th7thcenturiesAD,Norsemenhav
随机试题
X线从被检者的后侧射向前侧的投射方向为
按分数系统分类,属于非均相制剂的有()
(1)质检机构依照本方法发放等级证书,并且不允许以任何名义收取工本费。(2)等级证书遗失或者污损的,可以向原发证质检机构申请补发。上述说法正确的是()。
( )有助于确定一个特定企业或特定的建设工程可能遭受哪些损失,以及在何种情况下遭受这种损失。
封闭式基金绝对不可能进行扩募,因此其基金份额固定不变。()
现有一房地产开发项目,其占地面积为2000平方米,容积率为2.5,楼面地价为1500元/平方米,建造费用为3000元/平方米;预计项目建成后,建筑物可出租面积系数为0.75,初步确定项目的租金水平为230元/平方米·月(可出租面积),出租费用为毛租金收入的
个体根据任务的要求把注意从一个对象指向并集中到另一个对象上,称为注意()。
()是美术课程评价的依据。
我国颁布且实行的第一个学制是()。
Whatdidthemanwininhisdream?
最新回复
(
0
)