染色体数〔的〕变异

SSS 2011-12-27

This is Scientific American's sixty seconds science, I'm Steve Mirsky. Got a minute? The eastern green tree frog looks exactly like the close related cops gree tree frog, the big difference between the two species is beneath the surface. The eastern

发表于:2018-12-02 / 阅读(43) / 评论(0)

Scientific American(十二)月

英语课程计划-World Down Syndrome Day

World Down Syndrome Day is on March the 21st every year. It is on this day because the number 21 is important in the identification of Down Syndrome. The condition is created by a 21st, extra chromosome being replicated three times, thus causing the

发表于:2018-12-29 / 阅读(96) / 评论(0)

英语课程学习计划和讲义

CNN 2010-12-03

Are you in the holiday spirit yet? Well, let's take you Cross Country, beginning in Pittsburgh, Pennsylvania. You might now. Its pretty. Bob Cox loves to make the holiday light display a pretty big spectacle with 150,000 computer-animated lights. Now

发表于:2019-01-07 / 阅读(56) / 评论(0)

CNN2010年(十二)月

2005年NPR美国国家公共电台九月-Scientists: Male Chromosome Won't Lead to

Scientists at the Whitehead Institute in Cambridge, Massachusetts say it's fortunate for humans that the Y chromosome is not on the verge of extinction. That's because the Y is the chromosome that makes males males. The outlook is less favorable for

发表于:2019-01-08 / 阅读(145) / 评论(0)

2005年NPR美国国家公共电台

英语学习乐园：麦当劳点餐

James: I'm starving. Cody: So am I. But we don't have much money. James: We have enough for McDonald's. Cody: That would be great. I could eat a Big Mac set. James: Sounds good. Are we going, then? Cody: Sure. I know what I'm going to have. James: Wh

发表于:2019-01-23 / 阅读(37) / 评论(0)

英语学习乐园

VOA标准英语2011--Scientists Study Genetic Basis of Autism

Scientists Study Genetic Basis of Autism Scientists have taken another big step toward identifying the genetic flaws which may cause autism, a type of neurological development disorder. In the latest development, laboratory mice have been genetically

发表于:2019-01-31 / 阅读(39) / 评论(0)

VOA标准英语2011年(十月)

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