气液层析;气液色谱仪

英文笑话：Problem with gas放屁的问题

A little old lady goes to the doctor ... and says,

发表于:2019-01-02 / 阅读(72) / 评论(0)

英文笑话

Gas Shortage Intensifies in Mexico

Broadcast: Feb 13, 2003 Demand for electricity is growing in Mexico, but the state-owned oil company, known as Pemex, is reducing the amount of natural gas it can provide for electrical generation. Th

发表于:2019-01-03 / 阅读(77) / 评论(0)

VOA2003（上）-国际时讯

SSS 2011-08-12

This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a Minute? What's the best way to find out if an unknown mixture contains a specific substance, like an environmental contaminant? You could use an expensive, bulky gas chromatogr

发表于:2019-01-08 / 阅读(69) / 评论(0)

Scientific American(八)月

VOA标准英语2008年-Gas Prices Soar, Americans Buy Smaller Cars

By Deborah Block Washington 13 May 2008 As the price of gasoline continues to rise in the U.S., more Americans are buying smaller, more fuel-efficient vehicles. Others are holding on to their big cars, in hopes that gas prices will eventually go down

发表于:2019-01-13 / 阅读(67) / 评论(0)

VOA标准英语2008年（五月）

英语博客(A cup of English):013 Do you have gas?

Do you have gas? Beginners. What kind of a question is that? Are you talking about my body or my car? Well, actually, I am talking about your car. Gas, or petrol, as it is called in England, is a big subject at the moment. Driving a car has become re

发表于:2019-01-28 / 阅读(59) / 评论(0)

英语博客 A cup of English

VOA常速英语2008年-Israel to Redistribute Gas Masks Amid Fears of

By Robert Berger Jerusalem 02 April 2008 Israel is strengthening security on its home front in a sign of war jitters. As Robert Berger reports from VOA's Jerusalem bureau, Israel is casting a wary eye toward Iran. Israel's security Cabinet has decide

发表于:2019-01-30 / 阅读(75) / 评论(0)

VOA常速英语2008年（四月）

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学英语单词

3-epimethylschelhammericine

branched-chain reaction

broad ligament of lung

brow-down

bum-sucker

complimentary symmetry