时间:2018-12-18 作者:英语课 分类:大学四六级阅读


英语课

   数词


  表示数目多少或顺序多少的词叫数词,数词分为基数词和序数词。表示数目多少的数词叫基数词;表示顺序的数词叫序数词。
  一、基数词
  1)基数词写法和读法: 345 three hundred and forty-five;
  2)基数词一般是单数形式,但下列情况,常用复数:
  a. 与of 短语连用,表示概数,不能与具体数目连 用,如scores of people 指许多人;
  b. 在一些表示"一排"或"一组"的词组里;
  如:They arrived in twos and threes. 他们三三两两的到达了。
  c. 表示"几十岁";考试大,考试伴你同行
  d. 表示"年代",用 in +the +数词复数;
  e. 在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
  二、序数词
  序数词的缩写形式: first---1st second---2nd thirty-first---31st
  三、 数词的用法
  1)倍数表示法
  a. 主语+谓语+倍数(或分数)+ as + adj. + as
  I have three times as many as you. 我有你三倍那么多。
  b. 主语+谓语+倍数(分数)+ the size (amount,length…) of…
  The earth is 49 times the size of the moon. 地球是月球的49倍。
  c. 主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…
  The grain output 1 is 8 percent higher this year than that of last year.
  今年比去年粮食产量增加8%。
  d. 还可以用by+倍数,表示增加多少倍
  The production of grain has been increased by four times this year.
  今年粮食产量增加了4倍。
  2)分数表示法
  构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数:
  1/3 one-third ; 3/37 three and three-sevenths.

1 output
n.产量,输出,输出功率,输出端;vt.输出(信息等)
  • Grain output reached a new high in the three years.谷物产量达到三年中最高水平。
  • The chart showed us the global output of a factory.这张图表展示了一个工厂的总产量。
标签: 英语六级
学英语单词
.xlc
ADCOM
adjoint address
anchentry
arceye
atempol
auricle clamp
autobarotropic
automatic eye-brow pencil
biotite melteigite
bird's-eye wood
building supply houses
cellarman
cidariplura gladiata
clearing station
climacter
conagra
Cornus stolonifera
cowling pin
crash and burn
cut up unit
deep drawing high strength case
diffuse nebula
direct allocation of goods by the factory
direct current non-synchronous de fibrillation
direct frequency modulation system
disturbance spectrum
drive line systems
educational goal
electroporates
ergodically
Erigeron oreades
etulain
faerber
ferriheme
film coated magnet wire
flare speed
form line of thread
fumigation
gallium arsenide (GaAs) photodiode
genetic counselings
gentel
gravitarional potential well
guard column
Gyhum
hay fork
hemorrhage per rexin
herah
hypnonarcoanalysis
Hyǒngje-ri
in the neighborhood of
international sugar scale
isochromatic property
isomaltase
Kuorpukas, Gora
kusturica
leakage current screen
leapful
liement
Mannheim salt-cake furnace
maximum strain-energy theory
McIntosh-Fildes' method
more developed countries (mdcs)
neoseiulella compta
nmnh
noninflicted
notch tough steel
oestrogenic activity
off our onion
opalesque
parviglumis
Pavatest
pen recorder
permanent-resident
piston details
principle of digital TV
private style
Probstzella
propeller disk
pump-house
punch on
purpurella
quadriennially
quetiapine
radiation slip method
radio-fluorescence
rational function over a variety
reflection event
refrigerator paper
religiosas
septobasidium petchii
sourishness
spheric polar coordinate system
spherulites
spirelet
Sports Council
streamline production technique
tidal generation force
tolomerase
transfer linearity
tropic hormone
West Papua