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
44
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、often
B、also
C、always
D、still
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/AjGC777K
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?______.Since1870,Americanshavewitnessed______.
Knowingsomeofthecommonfaultsawritercanfallintowhilearguingisawayofavoidingthem.
Thereasonwhythewaterinthisareahadbeenpollutedwasthe______(poison)substanceshadbeenpouredintotheriver.
Now,onlinelearninghasbecomeacceptableandcommonplace.Itisseenbystudentsandemployeesasamoreflexibleandconvenie
Manmuststop______theearth’satmosphere.
Liquidsarelikesolids______theyhaveadefinitevolume.
ROUTE103—WESTBOUND(MALLOFSTARTOSUNSHINEBEACH)IfyoumissthebusatMallofStarat11:10,whenisthenextbustoSun
随机试题
“曾子以子游之言告於有子”中“於”的用法是
班主任工作的内容和方法主要有哪些?
口腔预防人员对一社区的居民进行口腔健康检查。若检查得到某人的CPI指数值为4,则表示()
下列说法正确的是()。
拱桥净跨径是每孔拱跨两个拱脚截面()。
要检查磁盘信息的正确性和完整性,并尝试修复磁盘的错误,应选用“附件”菜单下系统工具中的()。
下列关于个人抵押授信贷款期限的说法,错误的是()。
从四个图中选出唯一的一项,填入问号处,使其呈现一定的规律性。
左图是给定立体图形,将其从任一面剖开,问立体截面是?
ThenumbersofdeerhavefluctuatedmarkedlysincetheentryofEuropeansintoPugetSoundcountry.Theearlyexplorersandsett
最新回复
(
0
)