新东方优美背诵短文50篇 Unit48:Bacteria

Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bacteria are u

新东方背诵文选 L48 Bacteria

Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is abo

创新英语-Shopping Carts Covered in Bacteria

A new study into the hygiene of supermarkets has found that shopping carts are dirtier than the stores bathrooms. Microbiologist Dr Charles Gerba of the University of Arizona conducted research on the handles of 85 carts in four American states. He r

SSS 2008-09-23

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Sometimes a bit of bacteria can be just what the doctor ordered. If you prize yogurt for its active cultures, you know what Im talking about. Now a new s

SSS 2010-03-16

They say that who you hang out with says a lot about who you are. Well, the microbes that hang out on your fingers can point to exactly who you are. Because scientists at the University of Colorado in Boulder have been able to identify individuals ba

VOA慢速英语2010年-Health Report - New Test Could Speed T

This is the VOA Special English Health Report. Tuberculosis killed one million three hundred thousand people around the world in two thousand seven. In addition, almost half a million people who were infected with tuberculosis and with H.I.V. also di

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分集介绍：导数，商数，正弦和余弦 Derivatives.of.products.quotients.sine.cosine

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分集介绍：导数，斜率，速度与变化率 Derivatives.slope.velocity.rate.of.change

VOA常速英语2008年-Antibiotic-Resistant Bacteria Poses Threat to P

By Ruth Reader Washington, DC 13 February 2008 There is growing concern around the world over illnesses caused by new antibiotic-resistant bacteria, or so-called superbugs, and the decreasing effectiveness of antibiotics to treat infections. Earlier

HEALTH REPORT - Bacteria in Food

HEALTH REPORT -August 7, 2002: Bacteria in Food This is the VOA Special English Health Report. An American food company recently recalled about eight-million kilograms of ground beef that is used to m

英语游戏:愚蠢的香肠

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏，它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标

VOA慢速英语2011--Gut Bacteria: We Are What We Eat

HealthReport-GutBacteria:WeAreWhatWeEat This is the VOA Special English Health Report. The human digestive system is full of bacteria -- mostly good bacteria. These organisms help break down food so the body can use the nutrients. Scientists are expl

Experts: Let Produce Dry Out to Avoid Bacteria

Experts: Let Produce Dry Out to Avoid Bacteria American researchers say farmers should wait one day after a rain storm or watering their fields to harvest fresh fruits and vegetables. They say gathering the crops at least 24 hours after rainfall incr

VOA标准英语2011--E coli: Good Bacteria Gone Bad

E coli: Good Bacteria Gone Bad As a major outbreak of a highly toxic strain of E. coli bacteria continues to sicken residents of Europe, medical experts are racing to find the source. E. coli doesn't usually cause any trouble, says University of Minn

60秒科学:Cigarettes Are Bacteria Sticks,Too

Cigarettes Are Bacteria Sticks, Too A study in the journal Environmental Health Perspectives finds that cigarettes harbor various species of bacteria, some of which cause disease. Karen Hopkin reports This January, the country Turkey will join a hand

HEALTH REPORT - New Heart Drug Shows Promise in African Amer

HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure

Death Toll Rises From Deadly European Bacteria

European and World Health Organization scientists say a deadly outbreak of E. coli bacteria that has killed 18 people is a rare and virulent(致命的) strain of the bacteria. The latest victim died Wednesday night in Germany. The United Nations agen

Using bacteria to generate energy hopeful

BEIJING, May 24 (Xinhuanet) -- Scientists revealed for the first time the molecular structure of proteins, which enables bacteria to transfer electrical charges, according to a new study. The revelation was published in Proceedings of the National Ac

双语有声阅读：Bacteria

48 Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bac

听播客学英语 139 多丽丝·莱辛

Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833