单词：biased linear amplifier
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Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
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Fivelittlemonkeysjumpingonthebed Onefelloffandbumpedhishead Mamacalledthedoctor, Andthedoctorsaid Nomoremonkeysjumpingonthebed Fourlittlemonkeysjumpingonthebed Onefelloffandbumpedhishead Mamacalledthedoctor Andthedoctorsaid, Nomoremonkeysjumpingonthe
美国 Kidsongs 英语儿童歌曲
SCIENCE IN THE NEWS -May 21, 2002: First electronically controlled animals / Study of mothers and their sons / Effects of global warming Broadcast: VOICE ONE: This is Sarah Long. VOICE TWO: And this i
科技之光
The Animal Song When superstars and cannonballs are runing through your head. Television freak show cops and robers everywhere. Subway makes me nervous people pushing me too far. got to greak away so take my hand now because. I want to live like ani
音乐咖啡厅
LULU GARCIA-NAVARRO, HOST: In a little room at the University of Wisconsin-Madison, there's a scientific collection like no other, a room full of animal eyeballs. Want to see an eyeball from a duck-billed platypus - and who doesn't? Let's face it - o
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The Anatomy of Fear One nice day youre walking along a wooded path. You come around a corner and there, coiled in the path, is a huge rattlesnake , its rattles abuzz. You are deathly afraid of snakes. Various parts of the brain signal the nervous sys
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