单词：sample contamination
单词：sample contamination 相关文章
A: Why are you handing me a plastic cup? B: Your doctor wants to test your urine and needs a sample. A: How am I supposed to do that? B: We need you to urinate like you normally would, and then stop and finish into the cup. A: What am I supposed to d
英语情景对话-健康
Lesson 38 Water and the traveller 水和旅行者 First listen and then answer the following question. 听录音，然后回答以下问题。 What does this text describe? Contamination of water supplies is usually due to poor sanitation close to wat
新概念英语第四册
A: What is that plastic cup for? B: Your doctor has requested a urine sample. A: Am I supposed to pee into the cup? B: We want what we call a clean sample. Urinate a drop or so into the toilet, and then stop the flow and urinate into the cup. A: Then
英语情景对话-健康
环境问题一直雅思口语中经久不衰，比如近水之地、家乡可改变的地方、你关注的环境问题等等...下面雅思频道就为同学们整理了环境问题相关的词汇，希望同学们可以用到雅思口语话题中，
雅思英语
The government of New Zealand has launched an official probe into dairy exporter Fonterra in connection with its tainted dairy scandal in China. New Zealand government officials have been sent to Fonterra's offices in Auckland and Melbourne to invest
世界各地新闻集锦
This is Scientific Americans 60-Second Science. Im Adam Hinterthuer. Got a minute? Youve probably heard about mercury contamination in fish. But a new study says that the toxin has climbed out of the water. Researchers from the College of William Mar
Scientific American(四)月
星级典句： 第一句：You may have another certificate showing the goods to be free from radioactive contamination. 你们要开具另一份证明书，以证明货物没有受放射线污染。 A: Mr. White, any other requirements? 怀特先生，
天天商务口语
污染物 aerosols气溶胶 / 气雾剂 agricultural wastes农业废物 asbestos石棉 commercial noise商业噪音 composite pollution混合污染 dioxins二恶英 hazardous substances危险物质 hazardous wastes危险废物 heavy metals重金属 h
英文语法词汇
1. Washington is not looking for a graceful exit from the Iraq war. This assurance comes from President Bush in a private meeting Thursday with Iraqi leader Nouri al-Maliki. During the meeting, Maliki
美联社新闻一分钟2006
WRONG: The Lease does not provide for a period of time during which the Tenant is prevented to use the Premises. 错误用法：租约中并未指明房客不能使用所租房屋的时间界限。 RIGHT: The Lease does not provide for a period of ti
求职英语
Warning System Keeps Swimmers Out of Polluted Water 加州预警系统使游泳者远离污水 The dry conditions in California are good for people who like to swim in the Pacific Ocean. Because of the drought, there is less water runoff from cities
2015年VOA慢速英语(七)月
AS IT IS 2015-03-23 Would You Eat Food from Fukushima? 你会吃来自福岛的食物吗? Thousands of delegates from around the world gathered this month in northeast Japan for a United Nations conference on disaster relief. Four years ago, the area
2015年VOA慢速英语(三)月
今天我们要学的词儿是recall。 Recall是指产品质量有问题，厂商或是质量监督部门宣布回收产品的意思。美国先进医疗光学公司的一种隐形眼镜护理液最近出了问题，The contact lens solution is bein
英语每日一词
Below you will find a sample outline and the essay written from that outline. OUTLINE Paragraph 1 (Introduction) I. Leading sentence: It took me eighteen years to realize what an extraordinary influence my mother has been on my life. II. Summary of m
实用英语
Oil cleanup workers hired by BP search for tar balls as they work along white beaches in Pensacola Beach, Florida, 6 Jun 2010 Tourists are hitting the beaches in Florida for the start of summer, even as tar balls from the Gulf of Mexico oil spill was
VOA标准英语2010年(六)月
Katia: So, Enam, let's talk about environmental problems of our countries. In Bangladesh, what is an environmental problem? Enam: Actually, we have a lot of environmental problems in Bangladesh but mainly I'd say the soil contamination is quite bad,
英语趣味课堂
Enam: Katia, what are the environmental problems in your country? Katia: Well, I can think of three problems. One is water drought. The scarcity of water. Second, we have a lot of air pollution, and third a lot of deforestation. Enam: OK, so can you
英语趣味课堂
每一日你所付出的代价都比前一日高，因为你的生命又消短了一天，所以每一日你都要更积极。今天太宝贵，不应该为酸苦的忧虑和辛涩的悔恨所销蚀，抬
英文语法词汇
Todd: Now, Aaron, Australia's a big place. Can you describe the Australian landscape? Aaron: No worries. In Australia, there are cities and then there is country. Not many people live in the country, and the desert. About 70% of the population live o
英语趣味课堂
A: What is that plastic cup for? B: Your doctor has requested a urine sample. A: Am I supposed to pee into the cup? B: We want what we call a clean sample. Urinate a drop or so into the toilet, and then stop the flow and urinate into the cup. A: Then
健康-Health