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Tag questions are used when seeking confirmation of what one believes to be true. They restate, in question form, the previously spoken sentence. For example, He is an engineer. Isn't he? (Positive statement, negative tag) They're not from Colorado.
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This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang
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Jo: Hello, this is Real English from BBC Learning English, Im Jo. Jean: Hi 大家好，我是董征。欢迎收听Real English地道英语节目. Jo: In Real English, we look at words and phrases that you might not find in your dictionary. Jean: 和汉语一样，英语里也是
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T Tanshinone IIA 丹参酮IIA Tanshinone I 丹参酮I Tanshinone IIB 丹参酮IIB Taraxasterol 蒲公英甾醇 Taraxerol 蒲公英赛醇 Tauro ursodesoxy cholic acid 牛磺熊去氧胆酸 Taxifolin 花旗
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Tim: So, you know, we're talking a little bit about jobs. I'm kind of curious. Do you prefer working in a group or do you prefer working alone? Jeff: That's a tough question. Tim: It definitely is because there is good things about both. Jeff: That's
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10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur
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