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
59
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
GoingInternationalAmericanbusinessesarepartofaglobaleconomyr
TRACTABILITY:A、doubtfulnessB、impassabilityC、sterilityD、persistenceE、uselessn
ForeightyearstheClintonAdministrationpreachedtheneedforexquisitese
[originaltext]M:Ineedtocashthischeck.W:Willyoustepovertotheteller
不属于数字出版产业范畴的是( )。A.电子书 B.网络游戏 C.数字音乐
设备费的构成为( )。A.设备原价、运输费、装卸费和运输保险费 B.设备原价
下列目标是小班年龄阶段健康教育目标的是()。A.学会洗手、洗脸、整理衣物 B.
A.12kg、85cm B.14kg、105cm C.16kg、110cm
下列表述会计职业道德修养的环节正确的是()。A、形成正确的会计职业道德认知 B
A.红细胞膜上含A凝集原,血清中含抗A凝集素 B.红细胞膜上含B凝集原,血清中
最新回复
(
0
)