[化] 硫酸氢钠

SHALL WE CHOOSE DEATH?我们该选择死亡吗? I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of

发表于:2018-12-07 / 阅读(93) / 评论(0) 分类 世界上最伟大的演讲

The composition of the sun lies in this bar code. 这个条码说明了太阳的组成 All the thin lines are caused by tiny amounts of complex elements 这些细细的线条,都是微量复杂元素造成的 metals like iron and magnesium. 好比说

发表于:2018-12-07 / 阅读(127) / 评论(0) 分类 太阳科普

Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa

发表于:2018-12-07 / 阅读(127) / 评论(0) 分类 VOA2003(上)-科技导航

I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indians and Pakistanis

发表于:2018-12-12 / 阅读(94) / 评论(0) 分类 英语演讲

I couldn't get over this mess. The federal government is confirming what Joan Glickman of Pompano Beach, Florida suspected all along. Tainted drywall from China is giving off a harmful gas that's turning her air-conditioning wiring black, causing it

发表于:2018-12-20 / 阅读(90) / 评论(0) 分类 cnn2009年(十一)月

This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan

发表于:2019-01-04 / 阅读(107) / 评论(0) 分类 Scientific American(八)月

Salt is believed to be the single most harmful thing in our food, contributing to high blood pressure For years doctors have been telling patients with high blood pressure to cut down on the amount of salt in their diet. Now a prestigious panel of ex

发表于:2019-01-13 / 阅读(141) / 评论(0) 分类 VOA标准英语2010年(四)月

Protamine sulfate is a drug that reverses the anticoagulant effects of liver compounds such as heparin. Protamine is extracted from the sperm of salmon and other species of fish, and then made into a protamine sulfate injection which is a necessary d

发表于:2019-01-19 / 阅读(102) / 评论(0) 分类 世界各地新闻集锦

BERLIN, April 25 (Xinhua) -- A study recently published in the journal Nature Chemical Biology opens up new avenues in biohydrogen research, the Technical University of Berlin (TU Berlin) said on Friday. Scientists at the TU Berlin succeeded in expla

发表于:2019-01-26 / 阅读(68) / 评论(0) 分类 英语新闻

NEW YORK Plug in your car, then unplug, and drive away. More and more consumers are doing just that. At the 2014 New York Auto Show many automakers unveiled electric or hybrid vehicle to address the growing global appetite for environment-friendly ca

发表于:2019-01-30 / 阅读(97) / 评论(0) 分类 英语新闻

SEOUL/WASHINGTONThe U.N. Security Council said Wednesday that it was working to craft new sanctions against North Korea after its latest nuclear test, while the United States and other world powers voiced skepticism about Pyongyang's claim that the u

发表于:2019-02-04 / 阅读(57) / 评论(0) 分类 英语新闻

Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers have measur

发表于:2019-02-05 / 阅读(120) / 评论(0) 分类 托福英语

PREFIX 1.a-:of;on;intensive;negative,not,without;ad-;ab-. 2.ab-:away from,off. 3. ad-:to;at;for. 4. aer(o)- :relating to air . 5.al-:all. 6.ambi-:on both sides,around. 7.amphi-:on both sides,around. 8.an-:negative,not,without. 9.ana-:upon,up,on. 10.a

发表于:2019-02-06 / 阅读(136) / 评论(0) 分类 雅思英语

December 30, 1954 I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indi

发表于:2019-02-09 / 阅读(140) / 评论(0) 分类 英语美文

9月16日是墨西哥馆日,墨西哥馆五颜六色的风筝森林吸引了不少人的眼球,你知道小小的风筝里有什么大学问吗?其实风筝也有很多种分类哦,一起来看看吧。 说到kite这个单词,这也许是我们

发表于:2019-02-18 / 阅读(145) / 评论(0) 分类 英语口语

North Korea conducted a 'successful' hydrogen bomb test, Pyongyang has confirmed. The thermonuclear weapon triggered a massive 5.1 magnitude earthquake when it exploded at 10am local time on Wednesday. 平壤方面已经证实,朝鲜成功的进行了

发表于:2019-02-18 / 阅读(79) / 评论(0) 分类 英语新闻

We keep pumping carbon dioxide into the atmosphere and the earth keeps warming. Climate scientists have predicted that the consequences of unchecked warming could result in everything from catastrophic flooding to larger and more deadly hurricanes. S

发表于:2019-02-23 / 阅读(97) / 评论(0) 分类 英语时差8,16

First off, I'll mention that at the bottom of the sea there exist veins of zinc, iron, silver, and gold whose mining would quite certainly be feasible. 首先,我对您说,海底有锌、铁、银、金等矿藏,开发并不是不可能的事。

发表于:2019-02-25 / 阅读(172) / 评论(0) 分类 《海底两万里》中英双语有声读物

Almost nothing about it can be used to make reliable predictions about the properties of other liquids and vice versa. 它的身上几乎没有哪一点可以用来对别的液体的性质进行可靠的推测,反之亦然。 If you knew nothing of

发表于:2019-02-25 / 阅读(89) / 评论(0) 分类 万物简史

Oxygen itself is not combustible; it merely facilitates the combus tion of other things. (氧本身是不可燃的,它只是帮助别的东西燃烧。 This is just as well, for if oxygen were corn bustible, each time you lit a match all the air

发表于:2019-02-25 / 阅读(83) / 评论(0) 分类 万物简史
学英语单词
abraximorpha davidii ermasis
acetyl piperidine
adventuresomely
advice cards
aerozoon
algol c
allocatings
Anglical
anisotropic diffusion coefficients
arabinosyl nucleoside
artificial horizons
Ban Hin Dat
barraged
Buddha
castras
catchment glacier
character of measure space
characterization foctor
chliasma
chromobindin
Clarke's tongue
clivvy hook
compound feed-screw
cosmic abundance of elements
covering letters
cucurbitene
cutter making machine
cyanizes
D5S
data storage apparatus
diameter outside bark
double budded tree
drapery department
drift test
dynamic MOS shift-register
dyse
fells
fetch sth to a close
gate arm
Georgenthal
grain loading booklet
half-darks
hemosome
impact of performance
infringe the sovereignty
inhabited environment
interrelated trade
isodromic
jackye
knife-edge armature
kulaks
Larantuka
lateral gustiness
lewis form
like a maniac
Loch Ness
long-hour
loquito
maranon
micropituicyte
minimum resolvable temperature difference
nationalization of enterprises
nidrs
non-stocks
nostalgia
page-printing teleprinter
painted leaves
paleogeologic map
periclinal chimaemeras
pique oneself upon
platanthera bifolias
pressure vessels
quatres
recursive method
rubberer
schmaltzs
segmentative
selective identification facility (sif)
Sideritis
sign an agreement
spenceley
spoonleaf yucca
startler
step up your game
surface-ship torpedo tube
tanger
tbsp
temperature humidity chamber
teratism of testis
terminal sensillum
thermoluminescent dosimetry
thin route master station
thumbnail representation
to drop out
toe extension
top science
toxic anemia
turtleneck sweater
unmotivates
vandal
voltaic element
yblessed