单词：Osborn-Mendel(rat)
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In his youth Charles Darwin enjoyed all the freedom to experiment and do whatever he liked. The study of physics, chemistry, and later botany, was his hobby. At the age of 22, Darwin was invited to join the scientific expedition on the Beagle. During
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Blindfolded and huddled, one indication of what the British Royal Marines might be facing, these British servicemen, seized by the Iranian Navy off the coast of Iraq in 2004, later released. A retired American Special Forces officer, who was briefly
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ARI SHAPIRO, HOST: John Jay Osborn is a screenwriter and novelist who has mined his own life for material. In 1970, he based the book The Paper Chase on his time in law school. His new novel is based on an experience he and his wife had together. JOH
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Lesson 25 Rat 1.Rats! 2.I smell a rat. 3.You look like a drowned rat. 4.You dirty rat! 5.I was just ratting around. 6.I don't want to die like a rat. 7.Hey,pal,you see rats. 8.You must be in the rats.
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Mendeleyev dutifully completed his studies and eventually landed a position at the local university. There he was a competent but not terribly outstanding chemist, known more for his wild hair and beard, which he had trimmed just once a year, than fo
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Mendeleyev used a slightly different approach, placing his elements into groups of seven, but employed fundamentally the same principle. Suddenly the idea seemed brilliant and wondrously perceptive. Because the properties repeated themselves periodic
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Despite the occasional tidyings-up, chemistry by the second half of the nineteenth century was in something of a mess, which is why everybody was so pleased by the rise to prominence in 1869 of an odd and crazed-looking professor at the University of
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PEOPLE IN AMERICA – April 28, 2002: Milton Berle By George Grow VOICE ONE: I’m Mary Tillotson. VOICE TWO: And I’m Doug Johnson with the VOA Special English program PEOPLE IN AMERICA. Today, we t
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