分析试剂级化学品

Scientists Create Method to Test Food and Drugs for Purity

Scientists Create Method to Test Food and Drugs for Purity Millions of people in developing countries have to be on guard against contaminated food and medicine. Some products could be harmful -- even deadly. In Nigeria, brake fluid was found in a pr

发表于:2018-12-07 / 阅读(41) / 评论(0)

2017年VOA慢速英语(三)月

4. What Grade

Kristin,, my 17-year-old niece, had just gotten her driver's license and offered to take her mom's car to the gas station. She pulled up to the full-service pumps, and the attendant asked,

发表于:2019-01-03 / 阅读(79) / 评论(0)

英汉幽默故事选读

SSS 2011-02-14

Imagine Van Gogh's paintings of yellow sunflowers. Now imagine the flowers brown. Eh, not so good. Sadly, we may someday see what that would look like. Because the bright yellow paints on the canvas are slowly turning muddy. Now, an international tea

发表于:2019-01-08 / 阅读(48) / 评论(0)

Scientific American(二)月

2007年VOA标准英语-Possibly Hazardous Materials Found in UN Buildi

By Suzanne Presto New York 30 August 2007 FBI agents were called to a United Nation's building near the headquarters Thursday to remove vials of a possibly hazardous material found in weapons inspectors' offices. From VOA's United Nation's bureau, Su

发表于:2019-01-11 / 阅读(93) / 评论(0)

2007年VOA标准英语（八月）

what grade

What Grade Kristin,, my 17-year-old niece, had just gotten her driver's license and offered to take her mom's car to the gas station. She pulled up to the full-service pumps, and the attendant asked, What grade, miss?Eleventh! Kristin replied. Notes:

发表于:2019-01-25 / 阅读(98) / 评论(0)

趣味英语

学个词 Learn a Word-VOA英语教学 3032 nerve agent

今天我们要学的词是nerve agent. Nerve agent 神经毒剂。British officials said the chemical nerve agent known as Novichok was used in the attack on an ex-Russian spy and his daughter. 英国官员说，对一名前俄罗斯间谍和他女儿

发表于:2019-01-26 / 阅读(63) / 评论(0)

英语单词荟萃

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学英语单词

2'-CMP

Agapetes pseudogriffithii

asymmetrical roller bearing

Bacterium faecalis alcaligenes

Beis Din

callaos

carbazide