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
87
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://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
[originaltext]M:Hi,Jane,doyouhavesomechange?Ineedtomakeacallonth
随着气候的季节性变化,植物表现出与此相适应的生长发育节律,这一现象称为_____
以下属于法人验收的有( )。A.截流验收 B.分部工程验收 C.单位工程验
Thechangeinthatvillagewasmiraculou
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
瓦尔密大捷
以近似生物半衰期的时间间隔给药,为了迅速达到稳态血浓度,应将首次剂量A.增加0.
A.面横静脉 B.面深静脉 C.上颌静脉 D.颞浅静脉 E.面总静脉连接
急性下壁心肌梗死最易合并 A.室性早搏 B.房室传导阻滞 C.心房颤
男,45岁。发热、咳脓痰1周,胸片右下背段浸润阴影,用青霉素治疗体温稍下降。痰量
最新回复
(
0
)