[化] 叔丁氧基

This is Scientific American's 60-Second Science. I am Adam Hamterture, got a minute? What's sixteen feet tall and 9,550 years old? Its the world's oldest tree. The worn and weathered spruce grows in Sweden's windswept tundra. But, until recently, wel

发表于:2018-12-24 / 阅读(129) / 评论(0) 分类 Scientific American(五)月

86 去痛片须慎用 DATE=8-16-01 TITLE=SCIENCE REPORT - OxyContin Warning BYLINE=Jerilyn Watson (Start at 1'02

发表于:2019-01-02 / 阅读(172) / 评论(0) 分类 科技之光

By Phuong Tran Dakar 14 January 2007 Miners handle stones on a hilltop of Mbola mines in Democratic Republic of Congo (File photo) The collapse of a diamond pit mine in the Democratic Republic of Congo earlier this month, in which 15 people were repo

发表于:2019-01-06 / 阅读(200) / 评论(0) 分类 2007年VOA标准英语(一月)

1. 9/11 attack ringleader Mohamed Atta is all smiles with another hijacker on a new video reportedly Atta's last will. The Associated Press secured exclusive rights to the video from the London Sunday

发表于:2019-01-08 / 阅读(227) / 评论(0) 分类 美联社新闻一分钟2006

1. Two more Amish schoolgirls died overnight following a deadly shooting in their one-room schoolhouse in Pennsylvania Monday. That brings the total number of girls fatally injured in the incident to

发表于:2019-01-08 / 阅读(163) / 评论(0) 分类 美联社新闻一分钟2006

By Dan Robinson Capitol Hill 26 October 2006 As members of Congress campaign for the upcoming legislative election, back in the U.S. Capitol a congressional ethics committee completed the third week of an investigation that could yet have a major im

发表于:2019-01-11 / 阅读(236) / 评论(0) 分类 2006年VOA标准英语(十月)

By Dan Robinson Washington 03 October 2006 The controversy over a former Republican congressman who resigned amid revelations he sent sexually suggestive messages to male pages continues to reverberate in Washington and across the United States. Pre

发表于:2019-01-11 / 阅读(177) / 评论(0) 分类 2006年VOA标准英语(十月)

STEVE EMBER: Im Steve Ember. BARBARA KLEIN: And Im Barbara Klein with EXPLORATIONS in VOA Special English. Today we talk about a method that helps provide low-income people with the financial services they need to improve their lives. Organizations a

发表于:2019-01-11 / 阅读(228) / 评论(0) 分类 2010年VOA慢速英语(六)月

By Dan Robinson Capitol Hill 13 October 2006 Several issues are expected to be key in influencing how people vote in next month's U.S. congressional elections, from public perceptions about President Bush's handling of the war in Iraq, [and] the sta

发表于:2019-01-16 / 阅读(175) / 评论(0) 分类 2006年VOA标准英语(十月)

Beginners. Well, it's time for a new dog. For the past year, we have been a one dog family. But, you know, our dog, Rosie, is a wildly social lady. She goes crazy any time she meets another dog, a cat, a mouse, or a bird, let alone a human. But, the

发表于:2019-01-28 / 阅读(147) / 评论(0) 分类 英语博客 A cup of English

By Melinda Smith Washington 14 May 2007 Top executives of the company that makes a powerful painkiller called Oxycontin admitted this week they lied about the drug's addictive qualities in order to boost sales. As VOA's Melinda Smith reports, worldwi

发表于:2019-02-03 / 阅读(193) / 评论(0) 分类 2007年VOA标准英语(五月)

By Dan Robinson Washington 05 October 2006 Majority Republicans in the House of Representatives have moved to prevent further damage from the scandal involving a former Republican congressman, Mark Foley, who resigned amid revelations he sent sexual

发表于:2019-02-03 / 阅读(152) / 评论(0) 分类 2006年VOA标准英语(十月)

By Dan Robinson Capitol Hill 10 October 2006 The Republican Speaker of the House of Representatives has pledged to fire anyone on his staff who may have tried to cover up improper Internet contacts between a former Republican congressman, Mark Foley

发表于:2019-02-03 / 阅读(148) / 评论(0) 分类 2006年VOA标准英语(十月)

By Dan Robinson Capitol Hill 15 November 2007 The longest-serving Republican speaker of the House of Representatives gave his formal farewell to Congress on Thursday. Dennis Hastert presided over the House for nearly a decade, a period that included

发表于:2019-02-03 / 阅读(149) / 评论(0) 分类 VOA常速英语2007年(十一月)

By Dan Robinson Washington 10 December 2006 Democrats and Republicans in the House of Representatives have combined conciliatory rhetoric with criticism over legislative goals as Congress moves toward adjournment. VOA's Dan Robinson reports from Cap

发表于:2019-02-05 / 阅读(186) / 评论(0) 分类 2006年VOA标准英语(十二月)

By Dan Robinson Capitol Hill 04 October 2006 An ethics committee in the House of Representatives meets Thursday amid the continuing scandal involving a former U.S. congressman, Mark Foley, and sexually explicit e-mails he allegedly sent to congressi

发表于:2019-02-05 / 阅读(178) / 评论(0) 分类 2006年VOA标准英语(十月)

Beginners. Today, Foxy had an appointment with the vet for vaccinations and a general check-up. She is about eight months old, so she needed her second set of vaccinations. The vet also needed to see if her growth was normal and healthy. I put her in

发表于:2019-02-07 / 阅读(172) / 评论(0) 分类 英语博客 A cup of English

RIO DE JANEIRO, Jan. 25 (Xinhua) -- Former Brazil international goalkeeper Dida will miss Gremio's Copa Libertadores qualifying decider against Ecuador's Liga de Quito next Wednesday with a shoulder injury. Dida hurt his right shoulder during last We

发表于:2019-02-18 / 阅读(153) / 评论(0) 分类 英语新闻
学英语单词
3-mesatoin
actinokymograph
alics
attributed grammar
automatic identification data collection
Boonah
boot magnetron
bretherick
brucan
centrifugal sewage pump
chondrodystrophic myotonia
control-top
corase cossettes
core setting fixture
crucial ligament of foot
cylinder-type tank
data block
dealkylation of toluene
double pipet
drill footage per day
dynamic storage allocation scheme
dysgnathia
embarras de richesse
euphonous
Fakel
fetichistic
fog dispersal
free water level
give occasion to
give someone a rough time
grammopodius
greatgrandfather
grippeth
hand brake mast support
hard to get
hat shape steel
high flux hollow fibre
hydride transfer
incongruent melting!
inertial delay
Inst.C.E.
inverse limit
kalifates
Koplik's sign
lack of contrast
lamella (pl.lamellae)
lichen verrucosus
linea pectinata
look daggers at sb
loosen a screw
Lorenz Hart
lute-
major sevenths
make a joke about someone
man-made aurora
mechanism of decompressor
membrane separation plant
micro-cassette
misalign
mixed cipher
muonic antineutrino
natural fermentation
negative angle
neoplastic
neutron gamma reac-tion
nordenskioldine
occlusal guards
Old Wives summer
operative lay time
payday loan
peak load period
petiolular
polygamous
powder-boy
primary mineral deposit
punshon
pyrometric cone number
quasi-coincidence
RC (resistance-capacitance)
read-write channel
recoil atoms
rosoth
rusty tinamous
Saddar
saponification agent
sausage cage
section mould
sign-posting
slope development
Sre Russey
synchromesh feature
term birth
to agree on...
tomonori
unreliableness
unwarranted demand
vendor part modification
water scarcity
webcam
weimaraners
wittenagemot
xylosylating