[化] 层色谱法

layer chromatography的用法和样例:

例句

  1. Meanwhile, a thin-layer chromatography for detecting those prohibited azo dyes in textiles is presented.同时介绍了用薄层色谱分析法检测纺织品中禁用偶氮染料的方法。

[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:05.80]1998 Passage3 [00:08.62]Science has long had an uneasy relationship [00:11.94]with other aspects of culture. [00:14.56]Think of Gallileo's 17th-century trial for his rebelling belief [00

发表于:2018-12-01 / 阅读(349) / 评论(0) 分类 历年考研英语阅读理解

CHAPTER ONE [00:44.25]READING [00:45.74]Page 2 and 3 [00:48.43]THE YOUNG GREEN CONSUMER GUIDE [00:51.51]Review by Tony Ma [00:54.62]This book says that our world is in danger [00:59.32]It is vital that we do something to save the earth [01:04.21]Firs

发表于:2018-12-01 / 阅读(446) / 评论(0) 分类 上海牛津初中英语九年级

I first heard about the ozone layer about twenty years ago. I was still in school. I thought it was interesting, but I didnt take it seriously. It was a bit like science fiction, I mean, how could there be a giant hole in the atmosphere? Over the yea

发表于:2018-12-04 / 阅读(134) / 评论(0) 分类 听一分钟英文-O

There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th

发表于:2018-12-29 / 阅读(176) / 评论(0) 分类 英语课程学习计划和讲义

Another good candidate would be a government-run plant at Badarpur, less than 50km from the middle of Delhi. 另一个较好的选择便是位于巴达普(距德里市中心不到50千米)的官办工厂。 According to the Centre for Science and

发表于:2018-12-29 / 阅读(82) / 评论(0) 分类 经济学人科技系列

P-MAC packet media access controller PAD packet assembler-disassembler PCB printed circuit board PDS premises distribution system Personal Communications Personal communications provides at least one

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听力考试一直以来都是中国语言学习者在顺利通过英语考试的过程中的一个老大难问题。有不少的考生在英语的读,写,译等诸多方面都表现出了很强的实力,可是偏偏在英语听力这个部分出

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生活有希望,才快乐。 在好莱坞人人都梦想得到奥斯卡奖,连乞丐都满怀着希望,乞丐要饭时,旁边立了块牌子,上面写着: Help keep my Oscar Hopes Alive. 帮帮忙,让我保持我的奥斯卡希望。 对生

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美语中,一些感叹词的意义跟字典上的解释不尽相同,要在日常生活中才能体会到。让我们看看以下几个例子: Oh的字典意义是嗬;哦;哎呀,表示惊讶、的恐惧等。但将这个词连起来用,却

发表于:2019-01-09 / 阅读(118) / 评论(0) 分类 实用英语

Air pollution 空气污染 A: I've heard of ground-level ozone but can you explain what it is exactly? A:我听说近地面臭氧,但是你能确切解释一下是什么吗? B:Yes, it's one of the main air pollutants. Factories don't emit it dire

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Science Fiction-style replications, as seen in TV shows like Star Trek, might be a step nearer to becoming reality. Digital technology means it's now possible to make 3D objects from downloaded designs. Our reporter Li Dong has the details. These fun

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

A: May I exchange this DVD player? B: Certainly. Do you have your receipt? A: Here you are. B: Now, why do you want to exchange it? A: It won't play a DVD. B: I'm sorry. I'll get you a new player. A: At first, I thought it was me. B: Okay, here's a n

发表于:2019-01-20 / 阅读(138) / 评论(0) 分类 购物英语对话

A: I'd like to exchange this DVD player. B: Of course. Do you have your receipt? A: Here it is. B: Now, could you tell me why you want a different one? A: It refuses to play my DVDs. B: That's strange. Let me get you a new one. A: All my friends trie

发表于:2019-01-20 / 阅读(90) / 评论(0) 分类 购物英语对话

I first heard about the ozone layer about twenty years ago. I was still in school. I thought it was interesting, but I didnt take it seriously. It was a bit like science fiction, I mean, how could there be a giant hole in the atmosphere? Over the yea

发表于:2019-01-21 / 阅读(135) / 评论(0) 分类 纯正英语一分钟

HARI SREENIVASAN, PBS NEWSHOUR WEEKEND ANCHOR: Scientists studying climate change in Antarctica reported this week that the hole in the protected ozone layer of the earth's atmosphere has shrunk. The discovery of the hole in the mid-1980s led to a wo

发表于:2019-01-27 / 阅读(94) / 评论(0) 分类 PBS访谈环境系列

BEIJING, Jan. 29 (Xinhua) -- Thirty percent of official cars in Beijing should not be used when there is extremely bad pollution, traffic authorities confirmed Tuesday. The order was implemented on Monday evening to help combat the fourth round of he

发表于:2019-02-04 / 阅读(219) / 评论(0) 分类 英语新闻

口语:周末了 我们去滑雪吧 1. Layer up 一层一层把自己裹起来 Although it can be tempting to purchase the biggest, thickest items of clothing for a ski holiday, the best way to maintain heat is by layering lots of thin layers. When y

发表于:2019-02-09 / 阅读(97) / 评论(0) 分类 英语口语

M: Excuse me! W: May I help you? M: Yes, I'd like to send this book to France. W: Let me weight it first. That'll be 14 dollars. M: Can it go in an envelop? W: Of course, it's 4 dollars now. M: Do I need stamps? W: No, you don't. We use computers now

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你不来 我不敢老去 Actually, I'm old That I've to let the small tree in front of the door for me shed the leaves off I'm too old as to shell off a layer of earth And another layer of earth once more Seeing these layers of earth I know that goi

发表于:2019-02-25 / 阅读(92) / 评论(0) 分类 阅读空间

此题感谢lgc,是6月28日雅思写作大题目。关于能源危机的解决。此文思路清晰,结构除了建议部分稍显单薄,还是十分合理的,最关键的是本文的词汇功力,可以看出作者应该按照我上课的要

发表于:2019-02-26 / 阅读(161) / 评论(0) 分类 雅思英语
学英语单词
abrasive damage
Allai
ar rayn
armoured reconnaissance vehicle (arv)
assign network address
back axle
bartholdis
bow the knee to
bubbleheads
c.c.c
cauldron
cock-tread
cold-rolling practice
come to the wrong shop
compellingly
compose music
conservation-biology
consistent matrix
corner cube prism
dbe horizontal seismic force
deuterated manganese bath
dosantos
dustpan suction dredger
East Stoke
Exonians
extracorporeal shock wave lithotriptor
fibre rotator
flow elasticity
flue gas boiler
food-distribution
George Bryan Brummell
GGTI-286
grass oil
guidance counselor
guide wheel shaft bush
Halco
hand forging
Heldenlieder
hirayama
hybrid scalability
hyperactivism
hyperovals
hypochromatosis
iodometric titration
iterative array model
karyopyknotic index
kgr
konghuas
lake itch
lean on a broken reed
Ligamentum gastrosplenicum
mangement
Metopagy
miscopying
Montfortian
mudar
multiphase system
multiresource
neutron diffusion
New Bern
nitrosations
normal form pushdown automaton
northern flying squirrels
Ochtmersleben
old-car
over size shoes
oyly
oysters Rockefeller
petzite
photoionized
pilea involucratas
Playón
plus pressure process
poeticness
potential entrant
Prairie City
press(ed) ham
productivity factor
progresso
protoecium
Prudhoe
psychogenetically
Quercus wizlizenii
reaction threshold
recollate
resist to
roll film
shannonite (monticellite)
shipping traffic
silk scarf
somatodidymus
spiralium
striae malleolaris
tadpole (pl. taeniae) (taenia )
Tail-tree
temporoparietal
tributoxyethyl phosphate
ts (toll swithc)
turbinectomies
unmilitaristic
vuecelencia
waitzkin