单词:Manganhydroxylapatite
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[00:00.00] Unit 3 My favourite things [00:05.98]A Point and say.Listen [00:13.06]What do you have? I have 100 stamps. [00:22.02]Now say. What do you have? I have 100 stamps. [00:37.46]stamps [00:42.19]soft toys [00:47.65]key rings [00:52.90]badges [0
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
In January 2015, a fire in one of Russia's largest university libraries damaged more than 1 million historical documents, an incident which some media described as a cultural Chernobyl. 2015年1月,俄罗斯最大的大学图书馆之一发生了火灾