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A: Excuse me, Professor. I think there might be an error in my test score. B: Sure. Do you think that the total is wrong or that you got something marked wrong that should have been marked right? A: I think that the percentage is incorrect. B: Let's

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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

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A: Excuse me, Professor. I think there might be an error in my test score. B: Sure. Do you think that the total is wrong or that you got something marked wrong that should have been marked right? A: I think that the percentage is incorrect. B: Let's

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He took the state teachers exam. It was pass or fail. A passing score meant he could apply for a teaching job. A passing score was 220 to 300. The state emailed his score to him. His multiple choice test score was 260. His writing test score was 300!

2006年VOA标准英语-New Field Test Detects Blinding Disease Tr

By David McAlary Washington 11 May 2006 Scientists have developed a cheap, rapid test to determine who has trachoma, the leading infectious cause of blindness in poor countries. The researchers say th

VOA慢速英语 200707030041

This is the VOA Special English Agriculture Report. An American expert in food science technology has won a major international award. Philip E. Nelson has been named winner of the Two Thousand Seven World Food Prize. World Food Prize Foundation Pres

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This is the VOA Special English Economics Report. Recently, the United States Supreme Court decided a case on the property rights of inventors. The question was whether a business method is enough of an invention to receive a patent. Patents are a fo

VOA标准英语2011--Urine Test May Improve Prostate Cancer D

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STEVE INSKEEP, HOST: Turns out there are some workouts that can improve your memory. NPR's Jon Hamilton reports on two approaches to brain training. JON HAMILTON, BYLINE: Brain training programs often target something called working memory. KARA BLAC

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英语作文的六大结尾方式和例句

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HEALTH REPORT - New Method to Find Alzheimer's Disease

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By Jessica Berman Washington 12 October 2006 Researchers have developed a new tuberculosis test that makes a diagnosis possible in a fraction of the time it can take using other methods. Experts say the test would be especially useful in the develop

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A few minutes can feel like forever when you're waiting on the results of a pregnancy test. But in that brief time, you're witnessing the power of the scientific method. That one little stick lets you ask a question, perform a controlled experiment,

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第一、迷你对话 A: Look! It is not working well. Did you try out the bike when you bought it. 看，这两自行车不好用，你买的时候没试用吗？ B: No, theres no need. We can change it within two days if its not damaged. 是的，没