硝化磷酸盐

pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con

发表于:2019-01-03 / 阅读(118) / 评论(0) 分类 医务英语

分集介绍:导数,商数,正弦和余弦 Derivatives.of.products.quotients.sine.cosine

发表于:2019-01-05 / 阅读(351) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

分集介绍:导数,斜率,速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(352) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a

发表于:2019-01-08 / 阅读(142) / 评论(0) 分类 Scientific American(四)月

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏,它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标

发表于:2019-01-08 / 阅读(196) / 评论(0) 分类 英语对接游戏

HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure

发表于:2019-01-30 / 阅读(132) / 评论(0) 分类 健康与经济

Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

发表于:2019-02-19 / 阅读(116) / 评论(0) 分类 听播客学英语
学英语单词
a rich cake
access control word
accredit
adjustable swivel chair
alkoxycarbonyl
alternate planting
Ashar (virus)
beg pardon
Beregovoye
broaden business
business type budget
byte count oriented procedure
cassins
Charibert I
chiaroscurists
coal-gettings
commixing
common-battery telephone switchboard
cross-pumped laser system
croxton
Cyclooctanone
Cyril Burt
deep auricular muscles (rotator muscles)
derived fossils
dielectric printing
diuvaretin
double-shear lap riveting
electro sensor panel
engine cranking motor
epi-tectonic
equi-normal distribution
esra
Esso Petroleum
file transferability
firm invoice
flash circuit
Fleitmann's tests
flow transducers
fuel-reprocessing cell
gas test
genus Viscum
gingival margin
Glottograph
grandship
guurti
handwriting expert
hearing aid correction
Heubner's specific endarteritis
honkey, honkeys
IAAG
inexprimable
international system of unit
lactitol
life space
limnanth
lvi
malabathrum
manning and executive development charts
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Messys
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milk ring test
naubut khana (n. india)
odenite
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on the horns of a dilemma
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pradakshina
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SUBSHIP
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Yialousa