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
24
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] 【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://tihaiku.com/zcyy/3009101.html
相关试题推荐
【B1】[br]【B5】[audioFiles]audio_eusm_j01_021(20099)[/audioFiles]measure空中应填一原形动
Itishightimethat____________________(我们采取措施保护环境).wetookmeasurestoprote
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
[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
随机试题
[originaltext]TheAmericanPetProductsAssociationcarriesoutaNationalPet
我们刚才去超市了。Wewenttothesupermarketjustnow.
Writeanoteofabout50—60wordsbasedonthefollowingsituation;Li
Kellyisputtingthefinal______toherspeech.A、notesB、remarksC、commentsD、t
Anewstudyhasdrawnableakpictureofculturalinclusivenessreflectedin
Don’tletvacationsorbusinesstravelsideline(使退出)yourexerciseroutine.
初中美术《漂亮的手工灯饰》主要教学过程及板书设计 教学过程 (一)视频导入 老师播放一段灯光秀视频,学生初步感受灯光给我们生活带来的不同色彩。 师小结
A. B. C. D.
(2019年真题)预算单位零余额账户按照一般存款账户管理。()
社会评价中,进行利益相关者分析时需要开展的工作有()。A.识别利益相关者
最新回复
(
0
)