首页
登录
职称英语
Refrigeration (冷藏) is one of the most important means of keeping food. Refrig
Refrigeration (冷藏) is one of the most important means of keeping food. Refrig
游客
2023-10-07
14
管理
问题
Refrigeration (冷藏) is one of the most important means of keeping food. Refrigeration makes anything cold. Scientists and engineers have discovered many means of making things cold.
One way is to allow water, or another liquid, to evaporate (蒸发). Evaporation cools a liquid and the liquid cools the food.
Cold can also be produced by passing a gas through a small hole. Gases are made up of molecules (分子). Before the molecules pass through the small hole, they are close together. They are also moving quickly. Afterwards they are further apart and moving more slowly. Because the molecules are moving slowly, the gas is cool. The slower the molecules move, the cooler the gas will be. If the molecules move very slowly the gas changes into a liquid. Liquid oxygen can be made by passing it through a small hole.
选项
A、a liquid to move slowly
B、a liquid to evaporate
C、a gas to evaporate
D、a molecule to move slowly
答案
B
解析
此题题干问制冷的一种方法。在原文第2段可以得出蒸发可以让液体变冷。因此选项B. a liquid to evaporate是正确答案。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3079460.html
相关试题推荐
Ihavehadagreatdealoftrouble______(跟上班里其他同学).(in)keepingupwiththerest
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
TheimmigrantsinAmericaareplayinganimportantroleinthenationalscie
随机试题
BarackandMichelleObamaunderstandtheheavyburdenofstudentloandebt.Th
Ifyouhangback,andreserveandcriticiseatfirst,youarepreventingyoursel
February14isValentine’sDay.Althoughitiscelebratedasalovers’holid
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshe
《野生动物保护法》第9条将国家重点保护野生动物划分为国家一级保护野生动物和国家二
一患者缺失,余留牙正常。可摘局部义齿修复时基牙应该选择A. B. C. D
项目人力资源管理控制的内容包括( )。A.人力资源的选择 B.编制人力资源需
《中华人民共和国证券法》于()开始首次正式实施。A.1999年7月1日
教学的根本目的是() A.培养全面发展的人B.传授知识 C.发
慢性肺源性心脏病发病的主要因素,下列哪项不正确A、肺血管阻力增加 B、气道梗阻
最新回复
(
0
)