[化] 氢离子指示剂

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(171) / 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(218) / 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(207) / 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(174) / 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(172) / 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(211) / 评论(0) 分类 Scientific American(八)月

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(267) / 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(226) / 评论(0) 分类 2016年VOA慢速英语(十二)月

今天我们要学的词是indicator。 Indicator, 指示,信号。20国集团财长在巴黎开会并达成协议。 The agreement lays out a list of indicators that can be used to monitor the progress made by member countries in reducing imbalanc

发表于:2019-01-25 / 阅读(165) / 评论(0) 分类 英语每日一词

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(146) / 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(173) / 评论(0) 分类 英语新闻

By Gary Thomas Washington 14 December 2006 Iranian woman, wearing the traditional Islamic black veil, looks at campaign posters of female candidate Masoumeh Kolahi, in Tehran, 13 Dec 2006 Iranians are to vote Friday in elections for local government

发表于:2019-01-31 / 阅读(240) / 评论(0) 分类 2006年VOA标准英语(十二月)

Time again for our Website of the Week, when we showcase interesting and innovative online destinations. The World Bank lends money to promote development, and to help achieve its goals it collects a lot of data. For years, the World Bank has been on

发表于:2019-02-03 / 阅读(199) / 评论(0) 分类 VOA标准英语2010年(五)月

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(130) / 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(209) / 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(218) / 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(221) / 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(233) / 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(160) / 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(163) / 评论(0) 分类 万物简史
学英语单词
abstract data structure
agrometeorology
airlock module
amikacin
anarchic
apiculus
Atlantic tomcod
audit bureau
beggestere
block-jointed flooring
box connecter
Buritizeiro
camber of beam
capsomeree
carry the world before it
chronic vesicular dermatitis of the palms and soles
claw washer
coastal telegram station
counterremark
Croton eluteria
densen
diversion program
doughfeet
enchiladas
ethnic policy
Eutrema tenue
extensible metalanguage
fermi
fixed shear knife
for a bargain price
foreign offices
foundry goods
gilleo
heavy electron
highways
hollow jack
industrial committee for metal trades
insect pollinated plant
instructoress
intergeniculate
Iris narcissiflora
junction shaft
juxtapapillary
kaffir boom
labor total
leucofuchsin
level translator
magnetic transition
make a contract with sb
manduce (mediaeval europe)
maniness
maraud
medium bronze
most up-to-date
motion detection
national psyche
NDIS
neonatal atopic dermatitis
nervous prostration
network internal consumption
non rationalized system of units
nondiseased
nonhemolytic
octave-coupler
Odontochilus bisaccatus
outreach of derrik
overstates
Peritoró
photohelic gauge
pitch setting lever
pontooning
poto
probation officers
queen's park rangers
Quigley
rated ripple voltage
razor blade share
refik
retained reserve
River Lea
sentances
sewer bottom
Symplocos hookeri
system of vocational and technical training
the Health Service
thread blights
tilia oblongifolia rehd.
to be plain with you
transverse plane
tsa wu
Turkophilia
ultraminiature camera
ustilaginoideas
vegetable fibre board
verona yellow
virtual cut-through
wing channel
worn on
zelotes nishikawai
zeronin A