英语专八考前自测冲刺题：改错（一）

时间：2007-08-06 01:23:13

（单词翻译:单击）

We've all used thermometers to measure temperature
but sometimes we need to measure temperature in places you (1) __
can' t put 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 spectroscopy. Light from a laser point- (2) __
ing at the region of interest is absorbed by molecules2 and some (3) __
of it are re-emitted back towards the source where it can be (4) __
measured. The re-emitted fight is shifted in frequency (changed
in wavelength) by amounts that depend on the molecule1 and
also the temperature and pressure of the surrounding gas be- (5) __
cause of collisions among the molecules. The single, sharp
frequency from the laser is thus smeared3 out into a whole
spectrum4 of frequency whose shape can be used to determine (6) __
the temperature provided so that the molecular5 transitions and (7) __
line shapes are known. Because it is the main component6 of
the air, it is convenient to use nitrogen since its molecular (8) __
properties are known from room temperature to temperature
of about 1,200 degree Celsius7 from experimental measurements. (9)
Although this is a large range, it is far short of what it is needed (10) __
for, some applications.
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1 molecule Y6Tzn     
n.分子，克分子
参考例句：
  • A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由P妈?f婘??妈?成的。
  • This gives us the structural formula of the molecule.这种方式给出了分子的结构式。
2 molecules 187c25e49d45ad10b2f266c1fa7a8d49     
分子( molecule的名词复数 )
参考例句：
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。
3 smeared c767e97773b70cc726f08526efd20e83     
弄脏； 玷污； 涂抹； 擦上
参考例句：
  • The children had smeared mud on the walls. 那几个孩子往墙上抹了泥巴。
  • A few words were smeared. 有写字被涂模糊了。
4 spectrum Trhy6     
n.谱，光谱，频谱；范围，幅度，系列
参考例句：
  • This is a kind of atomic spectrum.这是一种原子光谱。
  • We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。
5 molecular mE9xh     
adj.分子的；克分子的
参考例句：
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时，分子的碰撞就停止了。
6 component epSzv     
n.组成部分，成分，元件；adj.组成的，合成的
参考例句：
  • Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
  • Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。
7 Celsius AXRzl     
adj.摄氏温度计的，摄氏的
参考例句：
  • The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
  • The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。

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