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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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How does acid deposition affect human health? We eat food, drink water, and breathe air that has come in contact with acid deposition. Canadian and U.S. studies indicate that there is a link between t

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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

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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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2006年VOA标准英语-New TB Test Yields Quicker Results

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