卤化氢

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(68) / 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(111) / 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(100) / 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(79) / 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(77) / 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(92) / 评论(0) 分类 Scientific American(八)月

One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water

发表于:2019-01-08 / 阅读(87) / 评论(0) 分类 Scientific American(四)月

The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into

发表于:2019-01-08 / 阅读(117) / 评论(0) 分类 英语小短文

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Steve Ember. This week, we will tell about an American study of the brain disorder schizophrenia. We tell about cars that use hydrogen as fuel. And,

发表于:2019-01-11 / 阅读(108) / 评论(0) 分类 VOA慢速英语2008(十)月

From VOA Learning English, this is the Health Lifestyle report. Garlic is one of the most common cooking ingredients around the world. Many dishes in Europe, Africa, Asia and the Americas use this strong-flavored vegetable. Garlic is similar to other

发表于:2019-01-12 / 阅读(114) / 评论(0) 分类 2016年VOA慢速英语(十二)月

紧凑型荧光灯 Compact Fluorescent Lamp 金卤灯 metal halide/halogen lamp 溴钨灯 Bromine tungsten lamp 汞灯 mercury lamp 钠灯 Sodium lamp 卤钨灯 Halogen tungsten lamp 碘钨灯 iodine tungsten lamp 氖灯/霓虹灯 neon lamp 石英灯

发表于:2019-01-17 / 阅读(84) / 评论(0) 分类 实用英语

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(54) / 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(82) / 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(42) / 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(102) / 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(122) / 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(124) / 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(130) / 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(66) / 评论(0) 分类 英语新闻

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(75) / 评论(0) 分类 万物简史
学英语单词
-shy
AC electromagnet
activated hydrogen
alpha-galactoside
ambisinister, ambisinistrous
anaza
avian favus
backflowing
bandy words (with)
belt respirator
bequeathing
beryllia valve seat
biedron
bipolar Schottky technology
blue radiation
boronias
break out of prison
canavanase
Cardioflux
cashier's checks
Colmar
Commission for Marine Meteorology
conic helicoid
current fertility
D.B.S.
defense peptide
delivery schedule
differential refractometer detector
diminutal
downcode
DRTE
e-system
eastview
editor
exposed surface
faatz
flange pass
flowcharting
fovea primitiva
gallium antimonide (gasb)
GDPM
get along so well
globe lilies
glucosyl
gnat-strainer
graduated rate
Grahame, Kenneth
grammatists
half-serve brake
hickes
i-loren
interschool
isotropic diffuse transmission
Javerlhac-et-La-Chappelle-St-Robert
jump phenomena
Knights Batchelor
laxative prescription
letter telegram
linguolabial
main idea
management information data flow system
Mcgarret
medicolegal examination
migrainator
moist-chamber culture
Moltkia
oil-supply head
open stern frame
orthoclasite
output horsepower
participant observer
patrollers
PI regulator
Platz
presearch
quarren
radial reflex
rectifier plate
retaining nut
revenue tariffs
robert louis balfour stevensons
Roman Jakobson
setting rate
sheave block
Smith, Charles Henry
society-wide general retail price index
sopss
spatia anguli iridis
ST_moving-on-foot_moving-unsteadily-or-with-difficulty
Stalactitum
suffusions
television transmitting station
temperature jump method
transfermium element
truckmaker
tuberizes
tuskiest
undesired
update window
V.P.
visual flight condition
waist