单词:erythronolactone
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This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. In 2005 two scientists won a Nobel Prize for discovering that a bacterium called Helicobacter pylori causes most stomach ulcers. One of them even chugged a
Personality and Character I: What kind of personality do you think you have? C: I'm easy to approach and friendly to everyone. / I'm inclined to think independently. / Frankly, I have a inquiring mind. / I think I'm a cooperative worker. / Well, I ap
By Patricia Nunan Kathmandu 26 April 2006 After months of confrontation, Nepal's king and opposition political parties say they will work together to bring peace and democracy to the country. Parliame
Rondi Charleston comes from a long line of singers and songwriters, dating back to her great-grandmother toiling on the Great Plains in the 1800s. Rondi's musical influences come together on her latest album, Who Knows Where The Time Goes. Like the r
We are here in Yellowstone National Park to follow some grey wolves and observe the deadly brilliance of the pack. Theyve learned to cooperate, hunting their prey with many acting as one pack. This mother grizzly knows how to protect its cub and itse