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
We’ve all used thermometers to measure temperature but sometimes we need to measure temperature in places you can’t put
We’ve all used thermometers to measure temperature but sometimes we need to measure temperature in places you can’t put
admin
2010-05-09
55
问题
We’ve all used thermometers to measure temperature but
sometimes we need to measure temperature in places you can’t put 【S1】______
a thermometer — for example, inside a rocket engine. One of the
best methods for those really hard-to-get-to place is based on laser 【S2】______
spectroscopy. Light from a laser pointing at the region of interest 【S3】______
is absorbed by molecules and some of it are re-emitted back 【S4】______
towards the source where it can be measured. The re-emitted light
is shifted in frequency (changed in wavelength) by amounts that
depend on the molecule and also the temperature and pressure of 【S5】______
the surrounding gas because of collisions among the molecules.
The single, sharp frequency from the laser is thus smeared out in
to a whole spectrum of frequency whose shape can be used to 【S6】______
determine the temperature provided so that the molecular
transitions and line shapes are known. Because it ’is the main 【S7】______
component of the air, it is convenient to use nitrogen since its
molecular properties are known from room temperature to 【S8】______
temperature of about 1,200 degree Celsius from experimental
measurements. Although this is a large range, it is far short of 【S9】______
what it is needed for some applications. 【S10】______
【S6】
选项
答案
frequency→frequencies
解析
frequency是可数名词,且前面是a whole spectrum of(整个的,所有不同的),所以要用复数形式。
转载请注明原文地址:https://kaotiyun.com/show/5lOK777K
0
大学英语六级
相关试题推荐
A、TheyproducedmorecarsthanAmericanmanufacturers.B、Theyreducedcar-productioninAmerica.C、Theygaveupmoremarketshar
Attheverybeginning,SamWaltonbelievedthathewouldearnmuchmoneyevenifhesoldproductsatlowerpricesthanhisoppon
Attheverybeginning,SamWaltonbelievedthathewouldearnmuchmoneyevenifhesoldproductsatlowerpricesthanhisoppon
Attheverybeginning,SamWaltonbelievedthathewouldearnmuchmoneyevenifhesoldproductsatlowerpricesthanhisoppon
Inthelate1960s’,manypeopleinNorthAmericaturnedtheirattentiontoenvironmentalproblems,andnewsteel-and-glassskysc
AIDS(AcquiredImmuneDeficiencySyndrome)isafataldiseasethatdestroystheimmunesystem.MorethanfouroutoffiveAIDSc
Insomeplacesleaveswillfalloffthetreesbeforetheychangecolorsintheautumn.Upuntilnow,scientistsstillcouldnot
A、Theywereevidentinthedecreasedworldtemperature.B、Theywereofseveraldays’durationworldwide.C、Theywerefeltmainly
A、Itrepresentsremarkabletechnologicaldevelopment.B、Itwilldolessharmtoenvironmentthanotherplanes.C、Wewillbenefit
A、Thedinosaurswentextinct.B、AnumberofmeteoritescrashedintoEarth.C、Someanimalspeciesevolved.D、Someplantswentext
随机试题
关于脑血肿变化过程中CT表现的描述错误的是
金属烤瓷冠的金属基底冠有瓷覆盖部位的厚度一般为
不属于苯二氮革类药物作用特点的是
梁的横截面是由狭长矩形构成的工字型截面,如图示。z轴为中性轴。截面上的剪力竖直向下,该截面上的最大切应力在()。
关于矿井通风方式的说法,正确的是()。
北方工程公司施工总承包了一项大型钢厂工程项目,工程范围包括土建工程、机械设备安装工程、蒸汽排风机安装工程、电气安装工程、自动化安装工程等。由于工期较紧,项目部编制了施工组织设计,对工程进度、质量、安全和文明施工管理进行了重点控制。施工过程中,施工单位成立了
当各项目小组成员对职能经理和项目经理双重负责的时候,项目团队建设经常会显得比较复杂。对这种双重负责关系的有效管理通常是(45)的职责。
对事物越了解,人们往往越谨慎。(bewaryof…)
Whatdoesthepassagefocuson?
BywhatmeansdidJoethinkhecouldbecomerich?
最新回复
(
0
)