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
abiogenetic gas
anamniotic
annuity payable out of a property
anoretic
antiketogenesis
arterial capillarys
battles of zama
befan
belleau woods
blue-blacknesses
caniss
casing log
cavernous breathing
chorea demonomania
citraconic
concrete piercing bomb
corn-hog cycle
data collecting instrument
deep cut
dimms
documentarylike
dorsal mediastinal lymph gland
driller's stour report
drilling for oil
eisp
encomiate
endothelial phagocyte
equi-interference standard
erector pilus
film indicator
florencite-(Ce)
flowering quinces
foodist
freeholder
functional attribute
geel (gheel)
gene deletion model
glewed
glyceroles
government by law
hard alloy cutter
hectovolt
hog snapper
humidity fluctuation
hydrocoral
ichimbwasa (rhodesia)
input/output control subsystem
integral type powersteering
interference mirror
isochronizes
kemner
Laihia
lap cement
leg-rest
line voltage controller
liquid brake
lycocerus nigricollis
lymphoepithelial cyst of oral cavity
marginalias
mechanical egg gatherer
medical aid organization
minnesota test of creativity
Morona
needle plasma arc
nesheim
neutrallzation reaction
non-uniform circulation
passive night vision device
personal appeal
plain cutter
Poseidonius
Post regulation
preominate
present address
president of raiway
projects approval authority
pulley
punch lines
rackett
Rampside
reduced molecular weight
research conclusion
roseate tern
Sakta
Saruhanlι
socket
stapledons
Steiner points
surprise witness
tax bearere
the other afternoon
top of mind awareness
trifasciatus
Tyrode's sloution
unconscionable
undue movement in share prices
valve control
vertical center of buoyancy
voluntary settlement
wilce
worserment
WWWC