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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

听电影学英语-别惹蚂蚁 15

[00:04.24]You can't exterminate me. 你不能消灭我的 [00:05.16]Oh, yeah. l'm Stan Beals! 哦 我可是Stan Beals [00:07.72]Oh, no, no, no! 哦 不... [00:13.96]Praise the Mother! 歌颂蚂蚁之母 [00:20.12]Lucas! Lucas! Lucas! Lucas! Lucas! Lu

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

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THIS IS AMERICA -March 4, 2002: The Lost Colony By Jill Moss . . . . . . . Broadcast: March 4, 2002 VOICE ONE: In Fifteen-Eighty -Seven, more than one-hundred men, women and children sailed from Brita

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

AP 2011-10-06

A lawyer for the doctor charged for MIchael Jackson's death says the singer died from drugs he injected on his own. The defense team claim Jackson swallowed several pills used to treat insomnia on the morning he died. He gave himself anesthetics ,cre

VOA慢速英语-THIS IS AMERICA - America's 'Lost Colony': A Story W

Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Faith Lapidus. Roanoke Island is off the mid-Atlantic coast of the United States, in North Carolina. In fifteen eighty-seven, more than one hundred people arrived

VOA慢速英语2009年-THIS IS AMERICA - America's 'Lost Colony':

VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Faith Lapidus. Roanoke Island is off the mid-Atlantic coast of the United States, in North Carolina. In fifteen eighty-seven, more than one hundred peo

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

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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

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One cold，frosty day in the middle of winter a colony of ants was busy drying out some grains of corn which had grown damp during the wet autumn weather．A grasshopper，half dead with cold and hunger，came up to one of the ants．Please give me a

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Vacationing on the island of Oahu, we were waiting in our tour bus for some stragglers to show up. A man, obviously not with our group, approached the bus and was about to board. How would our driver handle the situation, we wondered. Straight-faced,

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

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Ⅳ. Counter Offers 还盘 If a buyer does not agree with any or some of the transaction terms of a quotation or a firm offer, he sends a counter-offer. In the counter-offer, the buyer may show his disagreement to the certain term or terms and state

【听听测测】Model Test 1

17 President Bush said US forces will remain in Irac until ______ [A] It's a free country run by UN [B] It is a colony run by US [C] It is a freeland run by its own people 18 Bush officials say the White House may send peacekeeping troops to_____ [A]