[化] 1,2,3-三羟基恩醌; 蒽┢酚
[医] 三羟基蒽醌

AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster -- English teacher Lida Baker joins us from Los Angeles to talk about phrasal verbs. The first word is a verb. The second word, sometimes even a third, is usually a preposition. Ph

发表于:2018-12-04 / 阅读(226) / 评论(0) 分类 词汇大师(Wordmaster)

The Ant and the Dove An ant went to the bank of a river to quench its thirst, and being carried away by the rush of the stream, was on the point of drowning. A Dove sitting on a tree overhanging the w

发表于:2018-12-05 / 阅读(281) / 评论(0) 分类 创世记

The Ant and the Grasshopper In a field one summer's day a Grasshopper was hopping about, chirping and singing to its heart's content. An Ant passed by, bearing along with great toil an ear of corn he

发表于:2018-12-05 / 阅读(302) / 评论(0) 分类 创世记

AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster -- English teacher Lida Baker joins us from Los Angeles to talk about phrasal verbs. RS: The first word is a verb. The second word, sometimes even a third, is usually a preposition

发表于:2018-12-30 / 阅读(246) / 评论(0) 分类 词汇大师(Wordmaster)

Grammar Girl here. Today, guest-writer Bonnie Trenga helps us understand modifiers that come at the beginning of a sentence. Bonnie says, As a guest-writer, I plan to talk about two kinds of troublesome modifiers that begin a sentence. Like many of y

发表于:2019-01-02 / 阅读(285) / 评论(0) 分类 英语语法 Grammar Girl

Grammar Girl here. Listen up, everyone! Todays topic is phrasal verbs, as in to listen up. And now, guest-writer Bonnie Trenga writes, a listener, Paulino from Minneapolis, would like to know what phrasal verbs are and why they are called that. Phras

发表于:2019-01-02 / 阅读(289) / 评论(0) 分类 英语语法 Grammar Girl

Bid 投标 回复-同意投标 To: GALL Petroleum Development Attn: Mr. Tammy Hutchinson / Head of Contract and Supply From: Shenzhen Far East Oil Tools Ltd. Felix Jiang / General Manager Re: INVITATION TO TENDER - TENDER NO. HB-403 Tender Title: SUP

发表于:2019-01-06 / 阅读(306) / 评论(0) 分类 实用英语

After you have greeted your guests, you will begin to go through the main body of your presentation. It's very useful to have some visual aids - some slides, pictures or graphs that help explain what you are saying. Sometimes they can also help to k

发表于:2019-01-07 / 阅读(552) / 评论(0) 分类 英语讨论

An ant once leaned too far over the edge of a fountain and fell in-to the water.A dove was watching from a tree nearby.She saw that the ant could not swim so she plucked off a leaf and threw it down to him.He managed to scramble onto it and in

发表于:2019-01-26 / 阅读(340) / 评论(0) 分类 趣味英语

One cold,frosty day in the middle of winter a colony of ants was busy drying out some grains of corn which had grown damp during the wet autumn weather.A grasshopper,half dead with cold and hunger,came up to one of the ants.Please give me a

发表于:2019-01-26 / 阅读(347) / 评论(0) 分类 趣味英语

Zahra' Langhi 曾是利比亚愤怒日运动的一员。愤怒日运动有助于推翻卡扎菲专制政府,然而利比亚之后又该何去何从呢?在利比亚的第一次大选中,人们尝试创新了候选人名单交叉式候选人名单,

发表于:2019-02-05 / 阅读(244) / 评论(0) 分类 TED公开课:世界权势大转移

An ant and a fly were contending heatedly who was of greater importance.The fly was the first to begin:Can you possibly compare with my endowments?When a sacrifice is made,I am the first to taste the entrails that belong to the Gods.I pass

发表于:2019-02-06 / 阅读(334) / 评论(0) 分类 趣味英语

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发表于:2019-03-02 / 阅读(297) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(250) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(245) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(255) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(278) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(265) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(257) / 评论(0) 分类 加州英语分级G1

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发表于:2019-03-02 / 阅读(314) / 评论(0) 分类 加州英语分级G1
学英语单词
accessions
account activity
administrator impact assessment
aksumite
alkali number
Ansager
antenna curtain
anthropogeographical
apneumones
average excitation energy
axis of zero acceleration
binary internal translator
bran separating sieve
brondell
Cholsey
close-out collar
constrained annexation
convulsion of nature
cymatoderma caperatum
deltoid m.
diagonal Latin square
diaphragm barometer
dig for
dignities
distichophyllum collenchymatosum
engineering construction
fall out of use
film-badge service
first runner
fiscal engineer
flare stack burner
Fort Supply Res.
gondolier
graffigny
grass factor
Gynura cusimbua
helminthosporium foveolatum
horse-sickness
hypo-inosemia
identity papers
initial energy
interdivisional
interlocking pore
internatioal standard candle power
investment consumption cost
job-oriented language
kobaltin (cobaltite)
leadworts
left handed quartz
leptodactylus pentadactyluss
lioncel
loan-to-valuation ratio
lock-gates
low-level
Lukasiewicz notation
lunchless
magrene
Maikammer
mainshaft bearing cap
malison
master porter
merchantwoman
metal-clad meteorolite
militarylike
moeketsis
net cell sarcoma
ordered serial file
pentane insolubles
pentoseenes
phagosensors
philonotis roylei (hook.f.) mitt.
photopolymerizable
pin locking
procreate
prothrombokinase
pyridine-2-aldehyde
raised strake
revised optimum allocation
Rigal's suture
roup sale
RSAC
sahiwal cattle
sahliyeh
sensormedics
single-cotton double-silk covered
sized warp
spinal tract of trigeminal nerve
strain after originality
territory of a judge
the can
thermit iron
tightening force
total quality control
Trapeang Peak
triple agent
turbine control malfunction
tzarina
UNCIO
Vaikam
vapour-liquid ratio
variable-ratio transformer
Weinberg angle