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
外语
A、By passing steam over dry ice B、By turning ordinary ice into steam. C、By heating dry ice. D、By mixing dry ice with ordinary ic
A、By passing steam over dry ice B、By turning ordinary ice into steam. C、By heating dry ice. D、By mixing dry ice with ordinary ic
admin
2019-04-23
53
问题
Can you imagine ice that does not melt and is not wet? Have you ever heard of dry ice?[22]Dry ice is made by freezing a gas. It is quite different from ordinary ice which is simply frozen water.[25]Dry ice was first manufactured in 1925. It has since fulfilled the hope of its inventor.[23]It can be used for making artificial fog in the movies. When steam is passed over dry ice, a very dense vapour rises. It can also be used for destroying insects in grain supplies.[24]It is more practical than ordinary ice because it takes up less space and it is 142 degrees colder. Since it turns into steam, instead of melting into water, it is cleaner to use. For these reasons, it is extremely popular and many people prefer it to ordinary ice. Dry ice is so cold that if you touch it with your bare fingers, it will burn you.
22. What is dry ice made of?
23. How is an artificial fog made in the movies?
24. What is the advantage of dry ice over ordinary ice?
25. When was dry ice first made?
选项
A、By passing steam over dry ice
B、By turning ordinary ice into steam.
C、By heating dry ice.
D、By mixing dry ice with ordinary ice.
答案
A
解析
细节题。短文中提到,干冰可以用来制造电影中的烟雾(making artificialfog),随着蒸汽跃过干冰,浓厚的水汽就升起来了,可见人造烟雾是水蒸气掠过干冰的结果,故答案为A)。
转载请注明原文地址:https://kaotiyun.com/show/pLZ7777K
0
大学英语四级
相关试题推荐
Forthispart,youareallowed30minutestowriteashortessayentitledOntheImportanceofTeamworkfollowingtheoutlinegi
Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldstartyouressaywitha
Anewstudysuggeststhatthecloseinterspeciesbondthatexistsbetweenhumansanddogsmayextend27000oreven40000years
Pregnancymothersaregettinganewtooltohelpkeepthemselvesandtheirbabieshealthy:pregnancytipssentdirectlytotheir
A、Strangersareusuallyoflittlehelp.B、Oneshouldtakecareoftheirbike.C、Newsreportsmakepeoplefamous.D、Anactofkin
A、Tofreehismindoffwork.B、Toenrichhimself.C、Tomakenewfriends.D、Tokillthetime.A开头男士说,医生说他需要培养业余爱好,把注意力从工作中移开,故选A。
许多刚毕业的大学生找不到工作,在校学生则担心他们的未来。多个调查显示,三分之二的中国毕业生想在政府或者国有企业工作,而不是为中国令人瞩目的经济增长提供动力的民营企业。政府和国有企业被认为能免受经济萧条的影响。如今几乎没有大学生愿意放弃政府的铁饭碗而下海、加
Driver’sLicenseTestTips[A]Thisarticlewillprovideyouwithsomesimpletipsforpassingyourdriver’slicensetest.Adequ
A、Writinganarticleinthenewspapers.B、Dumpinggarbageonthecitylawn.C、Publishinganeditorialtoshowdisapproval.D、Org
随机试题
下列不是巨噬细胞在肿瘤免疫中的作用的是
甲是一机关单位干部,乙原为工厂工人,两人结婚已有10年。后乙辞职经商,依法登记为个体户。甲起初反对乙下海经商,但后来见收入不少,就不再反对,但一直没有参与乙的经营。乙的经营收入用于家庭消费和储蓄。一次因车祸导致乙损失货物价值13万元,债主找甲要账。甲有存款
某城镇最高日用水量为5万m3/d,水塔的调节容积为最高日用水量的7%,消防一次灭火用水量为35L/s,同一时间内的火灾次数按两次计算,持续时间按10min计算,则水塔的有效容积为()m3。
旧水泥混凝土路作为基层加铺沥青混合料面层施工时,应采取措施预防水平变形反射裂缝发生,以下措施正确的是()。
进口玩具经检验检疫机构检验合格,领取《入境货物检验检疫证明》后即可在市场销售。( )
客户卖出证券所得的资金,应当首先用于偿还客户对证券公司所负的债务。( )
下列行为中不属于行政行为的是()。
阅读以下算法说明和C程序,根据要求回答问题1和问题2。【说明】【算法4-1】的功能是用来检查文本文件中的圆括号是否匹配。若文件中存在圆括号而没有对应的左括号或者右括号,则给出相应的提示信息,如图1-18所示。在【算法4-1】中,slac
80286在保护模式下,虚拟空间为______GB,实际地址空间为______MB。
Healthimpliesmorethanphysicalfitness.Italsoimpliesmentalandemotionalwell-being.Anangry,frustrated,emotionally【
最新回复
(
0
)