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
专升本
To preserve food, the growth of bacteria(细菌)must be controlled. Water, warmth, and food are all needed for bacteria to become st
To preserve food, the growth of bacteria(细菌)must be controlled. Water, warmth, and food are all needed for bacteria to become st
admin
2018-07-18
17
问题
To preserve food, the growth of bacteria(细菌)must be controlled. Water, warmth, and food are all needed for bacteria to become strong and healthy. Some kinds of bacteria need air, but other kinds grow only when air is absent. Extremes of temperature, either hot or cold, can kill bacteria.
Before electric ice-boxes were invented, freezing and cooling were limited by the cold climate. In warmer regions, food was cooled by putting it in the shade, in cold water from the well, or in pits(坑)in the ground.
(71)
Cooking will usually kill bacteria if the temperature is high enough and the high temperature lasts long enough.
Certain methods of cooking remove water, and this aids in preserving food. Drying is the oldest and most common method of preserving food. Food can be dried by the sun, by heat or by combination of the two.
Salt was used by many hunting people. When people began to eat vegetables, salt became a needed part of their life. Salt helps to preserve food because it slows or stops bacteria to grow. Other chemicals besides salt are used in preserving food. Some people oppose the use of chemicals in food. They say that these chemicals may harm people if the chemicals can harm bacteria.
What is the passage mainly about?
选项
A、Ways of preserving food.
B、The bacteria in our food.
C、The importance of preserving food.
D、Ways of cooking food.
答案
A
解析
主旨大意题。在第一段作者介绍了保存食物的原理,从第二段起开始介绍保存食物的各种方法,如冷冻法、烹饪法、晒干法、腌制法等。因此,文章的主旨是保存食物的不同方法。故选A。
转载请注明原文地址:https://kaotiyun.com/show/ztPC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Findingitdifficultto______totheclimateinthecity,hedecidedtomovetothenorth.
Ithinkthesetraditionalcustomsshouldbe______.
Longagotherewasabusymarketplaceinatown.Peoplecametobuyand【C1】______allsortsofthingsthere.Onedayanold
Theeducatorandscholar______fromShanghai.
Itiscommonfornewstudentstosharedaroomwithotheruniversitystudents.Thenumberofroommateswilldependupontheuniv
Whenhiscarwasnowheretobefound,hewonderedifsomeone______it.
(Para.3,PassageOne)Realizingthatmyfather’sdayswerelimited,Itookthetimetotellhimfacetofacehowmuchheme
Thekeytoanysuccessfulgaragesale(家庭旧物出售)istogetthewordout.Thebestmeansofadvertisingyoursaleistoplaceanadi
A、Whethertheyshouldtakethechildhome.B、WhatDr.Mayer’sinstructionsexactlywere.C、Whoshouldtakecareofthechildat
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouareinside,theorganizationalconstraintsinfluencewage
随机试题
Word2010中,可以利用________选项卡给选中的段落添加项目符号和编号。
历史研究法在教育科学研究中的适用范围是什么?
2018年3月1日,日本某公司向日本商标局申请在葡萄酒类商品上注册“百佳”商标,5月1日被驳回。当年7月1日,该公司又向我国商标局申请在葡萄酒商品上注册同一商标。对此,下列哪一说法是正确的?()
低层、多层建筑常用的结构形式中,()是使用得最早、最广泛的一种建筑结构形式。
城市紫线范围内禁止进行的活动不包括()
当事人不服下列行为提起的诉讼,属于行政诉讼受案范围的是()。
获初级导游人员资格()年以上,考核考试合格后晋升为中级导游人员。
你所在的公安局派你去参加一个由上级组织的临时性的联合执法组活动。你打算怎么办?
一、注意事项1.本题本由给定资料与作答要求两部分构成。考试时限为150分钟。其中,阅读给定资料参考时限为40分钟,作答参考时限为110分钟。满分100分。2.监考人员宣布考试开始时,你才可以开始答题。3.请在题本、答题卡指定位
阅读以下说明,回答问题1~问题4,将解答填入答题纸对应的解答栏内。[说明]某单位局域网通过ISP提供的宽带线路与Internet相连,ISP分配的公网IP地址为202.112.12.32/30,局域网中计算机通过代理服务器访问Interne
最新回复
(
0
)