首页
登录
职称英语
[originaltext] In the old days, fresh food had to be eaten in the city no mo
[originaltext] In the old days, fresh food had to be eaten in the city no mo
游客
2023-08-03
33
管理
问题
In the old days, fresh food had to be eaten in the city no more than one or two days after it left the farm. If kept longer, it would spoil. One of the reasons behind it is that the air contains many living things that can harm our food. Some things, such as insects, can be seen by us. Others, like bacteria, can be seen only with a microscope.
All living things need water and man discovered that if this water is removed, the activity of the bacteria which causes food to go bad is prevented. In other words, we can protect some of our food by drying it. Besides, living things can only grow at certain temperatures, so we can also protect our food by heating or cooling it.
A New York man had an idea. He filled a wooden railroad car with tons of butter. The car was hooked to a train and pulled from New York to Boston. How could this be done? The butter was packed in ice, and twice during the trip more ice was added. This was the first refrigerator ear. As a matter of fact, People also used wooden boxes filled with ice to keep their food. Now we have mechanical refrigerator cars and mechanical refrigerators at home and stores and other places that need them.
选项
A、The ways of keeping food eatable for a longer time.
B、The killing of bacteria.
C、The invention of the refrigerator.
D、The role bacteria play.
答案
A
解析
What does the passage mainly deal with?
转载请注明原文地址:https://tihaiku.com/zcyy/2893002.html
相关试题推荐
[originaltext]Hello,everyone.Todaywearegoingtotalkaboutsomegenera
[originaltext]TodayI’dliketotalkaboutthenewspapersintheUnitedKin
[originaltext]TodayI’dliketotalkaboutthenewspapersintheUnitedKin
[originaltext]TodayI’dliketotalkaboutthenewspapersintheUnitedKin
[originaltext]TheBritishcelebratemanyreligious,historical,socialand
[originaltext]TheBritishcelebratemanyreligious,historical,socialand
[originaltext]Welcome,everybody,totheguideforthePeakDistrict.Situa
[originaltext]M:Hello,Kate.Howareyou?W:Oh,fine,andyou?Howdidthings
[originaltext]M:Hello,Kate.Howareyou?W:Oh,fine,andyou?Howdidthings
[originaltext]M:Hello,Kate.Howareyou?W:Oh,fine,andyou?Howdidthings
随机试题
—Itisasunnydaytoday.—______A、Soitdoes.B、Soisit.C、Soitis.D、Sodoes
Ourgreatestlackisnotmoneyforanyundertaking______ideas.A、asB、butrathe
Oldagehasalwaysbeenthoughtofastheworstagetobe;butitisnot【B1】___
在安全生产责任制中,对本单位安全卫生技术负领导责任的是()。A.工人 B.总
A.Ⅱ段+Ⅲ段 B.Ⅲ段+Ⅳ段 C.Ⅵ段+Ⅶ段 D.Ⅴ段+Ⅷ段 E.Ⅴ段
某民营企业的老板杨先生,现年40岁,年收入约30万元,但不稳定。杨太太,现年38
张先生于1999年1月11日与某物流公司签订了为期一年的临时工聘用合同,并被安排
新世纪新阶段,胡锦涛对人民军队的历史使命作出了“三个提供,一个发挥”的科学定位。
一般资料:求助者,男性,35岁,己婚,硕士学历,公务员。 案例介绍:求助者非常
反映产品质量水平和质量体系中各项质量活动进行及结果的质量管理体系文件是()。A.
最新回复
(
0
)