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This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Athletes have obviously been tempted to use performance enhancing anabolic steroids. Drug testing may discourage such use. But a new study finds that some of the perfo
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High-Tech Edge Sharpens Olympic Games At the very first Olympic Games, in 1896, an American won a gold medal in the pole vault event after jumping 3.30 meters using a wooden pole. Four years ago in Beijing, an Australian won gold in the same event wi
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So awesome, right? Another example is Pentair. Pentair is a U.S. industrial conglomerate. 很棒，对吧？另一个例子是滨特尔。滨特尔是美国的工业集团。 And about a decade ago,they sold their core power tools business and reinve
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听力题目： 17. (A). She chose some music to listen to. (B). She organized some photographs. (C). She read the menu and made a selection. (D). She moved the furniture in the room. 18. (A). Was there a performance last night or not? (B). Which cri
托福听力单句训练
听力题目： 17. (A). She chose some music to listen to. (B). She organized some photographs. (C). She read the menu and made a selection. (D). She moved the furniture in the room. 18. (A). Was there a performance last night or not? (B). Which cri
托福听力单句训练