But such tiny creatures, these sloppy feeders can carry many diseases. One of the worst on record is the Black Death, the great plague that swept across Europe，wiping out one third of the population. Breakfast shift over, the family heads off, ever

发表于:2019-01-22 / 阅读(178) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—6

Grain weevils are master safe crackers. Their battering ram shape snouts puncture most packaging. Like all insects, they don't have lungs but pump air through tiny pores on their outer skin. They don't like strong light, so layers of cereal couldn't

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自然百科2013年

英语听力：自然百科虫虫兄弟—5

Once the clothes make contact with human skin, so do the lice. They lay twice as many eggs as head lice, live twice as long and feed several times a day. If body lice drink blood infected with disease, they can pass that infection to humans through t

发表于:2019-01-22 / 阅读(142) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—4

Next door, Josh is the only one seemed to his business. All he feels is an itch, but invisible to the naked eye, a mite has get to go, too. Bloated with human skin, one mite can defecate about 20 pellets every day.And judging by the state of Danny's

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自然百科2013年

英语听力：自然百科虫虫兄弟—3

Woodlice set for the shadows, but other creatures are bolder. Outside a newcomer is looking for a way in, a male house spider. A water pipe is an opening invitation. It will take a lot more than a cold shower to deter this male on his hunt for a mate

发表于:2019-01-22 / 阅读(150) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—2

The ones which steal your food, share your bed, shred your clothes and eat your life. You don't need to leave the sofa to go on a survey. You just need a scanning electronic microscope to capture the action happening right under your nose and sometim

发表于:2019-01-22 / 阅读(144) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—11

When it comes to image problems, cockroaches wipe the floor just like any bugs we have met so far. they are fast, furious and one of the toughest creatures on earth. these are quick. They can move up to fifty body lengths per second. If we could do t

发表于:2019-01-22 / 阅读(218) / 评论(0)

自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—1

West Tibet, the roof of the world. In the thin air, 6000 metres high, a vast area of wasteland as far as the eye can see. In this remote corner of western Tibet, lie the ruins of a mysterious kingdom - a kingdom whose army was feared by all its neigh

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自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—8

Being so high also made the powers perfect strategic location, the sheer cliffs on three sides, and the steep summit made the city door virtually impregnable. (From here the slopes are very steep, any invaders would find it almost impossible to climb

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自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—7

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! Thank you！

发表于:2019-01-22 / 阅读(222) / 评论(0)

自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—6

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自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—5

This is his land, and these are his people. Tsering has brought John Bellezza here to learn about acient tales and fables from his tribe elders. Tsering has become a collector of stories from Guge's past with the help of these elders. Oral legends pa

发表于:2019-01-22 / 阅读(221) / 评论(0)

自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—4

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自然百科2013年

英语听力：自然百科古格：消失的西藏王朝—3

In its day, Guge was the Florence of the East. At the time when Genghis Khan's Mongols were advancing into central Asia and Europe, and the Crusades were being fought in Palestine, Guge was a flourishing centre of commerce, art, religion and politica

发表于:2019-01-22 / 阅读(151) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—23

It's been a long day for the male spider. He's been flushed out of house and home, nearly battered to death. But finally he's found his match and the date's a disaster. The vibes of the worst kind, she wants his body, all of it. Some female spiders e

发表于:2019-01-22 / 阅读(140) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—22

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自然百科2013年

英语听力：自然百科虫虫兄弟—21

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自然百科2013年

英语听力：自然百科虫虫兄弟—20

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自然百科2013年

英语听力：自然百科虫虫兄弟—19

A sprinkling of cheese mites. And meat specially tenderized by two mating house flies. But a bug in rich dinner is only the start of the evening's entertainment. There are cannibals in the cushions. Preliterate dust mites look for a more varied diet

发表于:2019-01-22 / 阅读(159) / 评论(0)

自然百科2013年

英语听力：自然百科虫虫兄弟—18

In warm weather, maggots can eat 60% of a dead human body in less than a week. This lot will probably manage a mouse before midnight. A few meters away in the next room, Josh and Alex prepare for battle, and not just with their computer games, there'

发表于:2019-01-22 / 阅读(156) / 评论(0)

自然百科2013年

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absolute immunity

actual equilibrium ccnstants

asset contribution factor

athopia