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
Liquid Nitrogen Nitrogen is the most common substance in Earth’s atmosphere. In the Earth’s atmosphere, nitrogen is a gas. T
Liquid Nitrogen Nitrogen is the most common substance in Earth’s atmosphere. In the Earth’s atmosphere, nitrogen is a gas. T
admin
2012-05-23
21
问题
Liquid Nitrogen
Nitrogen is the most common substance in Earth’s atmosphere. In the Earth’s atmosphere, nitrogen is a gas. The particles of a gas move very quickly. They run around and bounce into everyone and everything. The hotter a gas is, the【1】the particles move.
When a gas is【2】its particles slow down. If a gas is cooled enough, it can change from a gas to a liquid. For nitrogen, this happens at a very【3】temperature. If you want to change nitrogen from a gas to a liquid, you have to bring its temperature【4】to 77 Kelvin. That’s 321 degrees below zero Fahrenheit!
Liquid nitrogen looks like water,【5】it acts very differently. It disappears as soon as it touches the floor because it rapidly boils and changes back to a gas at room temperature. A flower dipped in liquid nitrogen will shatter because all of the water in the flower【6】instantly. An inflated【7】placed in liquid nitrogen will appear to slowly deflate. The air isn’t leaving the balloon, though. It’s just taking【8】less space because it’s getting cold and its particles are moving slower. Once the balloon is removed from the liquid nitrogen, it warms back up and returns to normal.
Although experimenting with liquid nitrogen is fun, we【9】need to be careful with it. We always need to protect our eyes by wearing goggles and our【10】by wearing gloves. After all, we wouldn’t want to freeze and shatter like a flower!
选项
A、warmed
B、cooled
C、heated
D、compressed
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/rjGC777K
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
Whichofthefollowingisthemainpsychologicalsymptomofsmokerswhoquit?______.Whichofthefollowingstatementsistrue
Whichoffollowingbestdescribesthemainideaofthepassage?______.Whatdoestheword"urge"inthelastparagraphofthe
Intheolddays,asonewifesaid,thehusbandwasthehusbandandthewifewasthewifeandthey【B1】hadtheirownwayofgoin
Therearemanyproblemsinourmodernworld.Oneveryseriousproblemisenergy.Wegetagreat【71】ofenergyweneedfromcoal
Hewascaughtintherainyesterday;______,hefellillthismorning.
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thismightbecalledlaziness,butDr.Kleitmanhasanew
Now,onlinelearninghasbecomeacceptableandcommonplace.Itisseenbystudentsandemployeesasamoreflexibleandconvenie
MaryandhersisterAhavelittleBofcommonCexceptthattheysharethesameDinterestinbowling.
ThewinddieddownandtheGreatwallatMutianyuwasbathedinwarmsunshineandclearbluesky.Thislengthofwallismuchle
随机试题
我国刑事诉讼法规定侦查机关在必要的时候,可以采取有关的强制性措施,依照规定,侦查人员可以在必要时,强制检查下述哪类人员的人身?
一次抽样方案由()组成。
监理单位组织工程的预验收形成()资料。
人力资源管理是对企业()的获得、开发、保持和利用等方面进行的计划、组织、领导和控制活动。
下列适用我国《产品质量法》规定的产品有()。
心理咨询应该让求助者意识到(),才能帮助人们恰当应对现实。
下列句子中标点符号使用正确的一项是()。
(2012)我国现行的《中小学教师职业道德规范》颁布于()年。
正式审议和通过了《关于建国以来党的若干历史问题的决议》,标志着党在指导思想上拨乱反正的历史任务的完成的会议是()。
颈外静脉(externaljugularvein)
最新回复
(
0
)