单词:24-hydroxylase
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It was Christmas Eve.An aged man was standing on the balcony,with uneasy,alarmed and pessimistic expression;he sighed for his miserable fate, and raised his sad eyes,gazed at the sparking stars in the deep blue sky. A falling star depicted a curve in
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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? On June 4th we told you about iron snowflakes on Mercury. Today we have some radical news about the atmosphere of Venus. Literally, a radical is a molecule that reacts e
Erythromycin,红霉素 Azithromycin,阿奇霉素 Clarithromycin,克拉霉素 Fluoroquinolones and their derivatives (e.g. levofloxacin),多西环素(如:脱氧土霉素) Tetracyclines (e.g
分集介绍:导数,商数,正弦和余弦 Derivatives.of.products.quotients.sine.cosine
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Good news for book lovers in Beijing: the citys first 24-hour bookstore, to be a cultural landmark, has been launched by the Sanlian Bookstore. Owned by the China Publishing Group Corporation, Sanlian is a major bookstore in the country. It has start