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
28
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] 【S10】
选项
答案
it →/
解析
what在宾语从句中作主语,it是多余的。
转载请注明原文地址:https://tihaiku.com/zcyy/3009105.html
相关试题推荐
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
We’veallusedthermometerstomeasuretemperaturebutsometimesweneedto
[originaltext]Unlessmeasuresaretakenatonce,thereisagoodchancetha
[originaltext]UnlikeBoas,whohadonlysuggestedlanguageasameasureof
随机试题
Formostspeciesofanimals,thenumberofindividualsinthespeciesisinverse
金某(15周岁)在课间因小事与同学沈某发生争执,金某一拳击中沈某头部,致使沈某倒
两个或两个以上的当事人按共同商定的条件,在约定的时间内定期交换现金流的金融交易是
结核分支杆菌检查最适宜的尿标本为A.随机尿B.3h尿C.首次晨尿D.12h尿E.
关于权益报酬率计算正确的是()。A:权益报酬率=销售净利率*权益乘数 B:权益
上述化合物以甲苯-甲酸乙酯-甲酸(4:5:1)为展开剂,进行硅胶薄层层析时,其R
危机公关是指由于企业管理不善、同行竞争甚至遭遇恶意破坏或者是外界特殊事件的影响,
发生发票丢失情形时,应当于发现发票丢失的()向税务机关书面报告。A.当日
A.防御反射 B.对侧伸肌反射 C.状态反射 D.牵张反射 E.翻正反射
最新回复
(
0
)