单词:phosphate ion
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[00:00.00] unit 14 Mainly Revision [00:34.51]Ann___(not,watch)TV last night.The children__(go)to the farm last Saturday. [00:47.86]The boys__(meet)after school yesterday afternoon. [00:53.42]Mr Turner__(say)sorry to the conductor on the train because
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pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
Love Your Mom (Excerption)感恩母亲(节选)Those Teenage Years少年岁月When you were 13, she suggested a haircut that was becoming. 你13岁,她建议你把发型剪得体。 You thanked her by telling her she had no taste. 你报答她,对
ALMATY, April 19 (Xinhua) -- Kazakhstan Fashion Week (KFW) Fall/ Winter 2012 opened in the southern capital Almaty on Thursday. Designers from Kazakhstan, Germany, the United Arab Emirates, France, Britain, Lebanon and Georgia will be taking part in