Andrea: We all know about Scottish tartan. And have heard the sound of bagpipes. But what about the food in Scotland? Hello. I'm Andrea. A lot of people talk about the unhealthy, fried food you can eat in Scotland. But there are plenty of delicacies

发表于:2019-03-06 / 阅读(257) / 评论(0)

英语时差8，16

【英语时差8,16】肉不宜二次冷冻

On the way home from the grocery, you get delayed so much that the frozen meat youve bought thaws out. The question is should you refreeze it?Weve been told by reliable authorities that its not good to refreeze uncooked meat. Why not? If freezing the

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英语时差8，16

【英语时差8,16】走路不是简单活-上

Youre at a party. Somebody hands you a glass. Hey, come on over here! Somebody else shouts. You take a step and the next thing you know you are wearing that tasty beverage. But why? When we walk, we keep our torsos straight, dont we? Walking feels en

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英语时差8，16

【英语时差8,16】太阳能也能用于制造液体燃料？ -上

I know that solar energy can be used to make electricity and to heat water and air. But can solar power also be used to make liquid fuels? Until recently, the practical answer was no. Photovoltaic panels absorb sunlight and use it to create an electr

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英语时差8，16

【英语时差8,16】太阳能也能用于制造液体燃料？ -下

Instead of burning coal, oil, or biomass to heat things up, scientists have found that its possible to use solar energy. For example, some experimental facilities use thousands of mirrors to reflect sunlight onto a large plate on a tower, heating it

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英语时差8，16

【英语时差8,16】夜生活 : 看电影 -下

I think people enjoy going to the cinema because it's a relatively cheap evening. Andrea: And there are so many different kinds of films to see. I prefer action films mainly. I'm pretty much middle- of-the-road. I don't do war films but apart from th

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英语时差8，16

【英语时差8,16】夜生活 : 看电影 -中

I'm inside London's and the UK's oldest cinema, The Electric, in the west of London. It's very grand in here with gold and cream walls and red velvet carpets. And I'm really looking forward to enjoying a night at the movies. Andrea: Well, it was very

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英语时差8，16

【英语时差8,16】凯瑟琳泽塔-琼斯获托尼奖 -下

After the awards the mother of two said she was in a state of shock and was astounded at winning the award. Her ongoing performance in the musical is her Broadway debut and has received rave reviews from critics. One critic described Catherine's perf

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英语时差8，16

【英语时差8,16】冰激凌融化：热传导 -下

To get a handle on the value of this model equation lets go back to the ice cream scoop. The end result is obvious to our intuition, that the ice cream will eventually melt completely, because we know heat naturally flows from warm to cold. But what

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英语时差8，16

【英语时差8,16】凯瑟琳泽塔-琼斯获托尼奖 -上

Catherine Zeta-Jones said she felt like cinderella after winning one of the night's biggest gongs at the Tony Awards on Sunday. The Tony Awards are regarded as the highest US stage honour and are the theatre equivalent to the Oscars. The UK has simil

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英语时差8，16

【英语时差8,16】夜生活 : 看电影 -上

I've just seen Paranormal Activity. I've just seen Alice in Wonderland. I went to see Green Zone. I've just seen Avatar. Andrea: Yes, all these people have just been to the cinema. Going to the cinema for a night out remains extremely popular here in

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英语时差8，16

【英语时差8,16】什么是卟咻症？2

In this form of hereditary porphyria, the skin becomes white with anemia and very sensitive to light. (Remember that vampires only come out at night.) The teeth of Porphyria victims become reddish and even glow under ultraviolet light. Hair grows fas

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英语时差8，16

【英语时差8,16】为何世界大部分为空白？

Sure, you think the world is full of solid objects. You think the radio youre listening to is solid. You think the floor youre standing on or the chair youre sitting in is solid. Heck, you probably think that you yourself are a solid object. Wrong. O

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英语时差8，16

【英语时差8,16】奥尔特云与彗星

The Oort cloud is a spherical haze of comets that surrounds our entire solar system. We often get the false impression that the solar system ends with Pluto. In fact, beyond Pluto is the Oort cloud, encircling everything else like an enormous shell.

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英语时差8，16

【英语时差8,16】婴儿牙牙学语2

Perhaps the baby isnt hearing properly, or perhaps the problem is cognitive. Or, as is sometimes the case, the babys parents arent speaking to the baby enough. Because experts believe that while some capacity for language is ingrained, learning how t

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英语时差8，16

【英语时差8,16】婴儿牙牙学语

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英语时差8，16

【英语时差8,16】动物界的染色体有何不同？2

But whats true for mammals isnt always true for the rest of the animal kingdom. The sex of baby birds is also determined by two different sex chromosomes, but in birds, its the male that has two of the same-shaped sex chromosomes and the female that

发表于:2019-03-06 / 阅读(181) / 评论(0)

英语时差8，16

【英语时差8,16】动物界的染色体有何不同？

In mammals, the sex of a baby is determined by the combination of chromosomes it inherits from its parents. Nearly every cell in a male body has two different sex chromosomesone is shaped like an X and one is shaped like a Y. Females also have two se

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英语时差8，16

【英语时差8,16】如何界定性别？2

Another sexual difference among mammals that doesnt hold with other animals is size. In most mammals the male is larger than the female, but in most other animals where there are two distinct sexes, the female is the larger one. Today scientists defi

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英语时差8，16

【英语时差8,16】什么是卟咻症？

The vampire is the stuff of the great horror stories. However, a recent textbook by geneticist John Jenkins suggests that Bram Stokers legend of the vampire, Dracula, may have had its basis in a very real disease that prevents some people from gettin

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英语时差8，16