首页
登录
职称英语
We’ve all used thermometers to measure temperature butsometimes we need to
We’ve all used thermometers to measure temperature butsometimes we need to
游客
2023-09-13
43
管理
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】______ [br] 【S3】
选项
答案
pointing→pointed
解析
由于激光是被动指向目标,应该用过去分词。
转载请注明原文地址:https://tihaiku.com/zcyy/3009098.html
相关试题推荐
Itishightimethat____________________(我们采取措施保护环境).wetookmeasurestoprote
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
While______(邮政和电信依然为国家控制)andthusreadilymeasured,morethanlmsmalltrucki
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
[originaltext]Unlessmeasuresaretakenatonce,thereisagoodchancetha
[originaltext]UnlikeBoas,whohadonlysuggestedlanguageasameasureof
[originaltext]UnlikeBoas,whohadonlysuggestedlanguageasameasureof
随机试题
Mybossaskedmetoanswerthephone,totakeallmessages,and______somelett
[originaltext]M:Hello?W:Hello,I’mcallingabouttheapartmentthatwasadve
Shehurriedlylefttheroomasif______.A、sheangryB、wasangryC、itwasangryD
[originaltext]W:Lookupatthesky,isn’titterrible?Deyouthinkit’ssafe?
下列儿化韵中,发音方法不同的一个是?()A.刀把儿 B.方格儿 C.小肚儿
接口是连接外围设备与计算机主机之间的桥梁,以下关于接口功能的叙述中,错误的是()
A.晕动病引起的呕吐 B.除晕动病外的各种呕吐 C.胃食管反流病 D.肿瘤
高度超过( )米和特殊部位使用的脚手架,应专门设计并报建设单位(监理)审核、批准
()综合反映了商业银行经营管理的水平。A.贷款安全性 B.贷款发放额 C.存
对目前我国发展社区卫生服务的基本原则描述最恰当的是( )。A.以政府为中心
最新回复
(
0
)