卖空者的多空套做，空头价差交易

SCIENCE IN THE NEWS - Diseases Spread by Mosquitos

SCIENCE IN THE NEWS - Diseases Spread by Mosquitos By Nancy Steinbach Broadcast: Tuesday, January 25, 2005 (MUSIC) VOICE ONE: This is SCIENCE IN THE NEWS, in VOA Special English. I'm Barbara Klein. VO

发表于:2018-12-07 / 阅读(43) / 评论(0)

科技之光

WHO: Cholera in Chad Could Spread to Sudan's Darfur

By Carrie Giardino The government of Chad is calling for international assistance to fight a cholera outbreak in the country. The World Health Organization says it is concerned that the disease could

发表于:2019-01-03 / 阅读(48) / 评论(0)

VOA2004（下）--健康科技

The Dancing Bear

A bear who had for a long time earned his living by dancing，at length escaped from his master，and returned to his former companions in the woods．His brethren welcomed him with their most friendly growls．The traveller then related what he had

发表于:2019-02-08 / 阅读(85) / 评论(0)

趣味英语

The Travellers and the Bear

Two friends were travelling together when they met with a bear．One of them was in great fear，and without a thought of his companion climbed up into a tree，and hid himself．The other seeing that he had no chance，single－handed against the be

发表于:2019-02-08 / 阅读(75) / 评论(0)

趣味英语

咱们裸熊第29期:煎饼挑战

Hey, we almost there? 嘿，咱们快到了吗？ Says that it's right here. Wup, wup, we passed it. Back up, back up. 说是就在这的。等等，我们走过了。退回去，退回去。 There it is. I see it! 就是这个，我看见了！ Welc

发表于:2019-02-19 / 阅读(85) / 评论(0)

咱们裸熊

英语听书《白鲸记》第346期

If, then, to meanest mariners, and renegades and castaways, I shall hereafter ascribe high qualities, though dark; weave round them tragic graces; 那么,如果我以后将把高尚的品质(虽然并不明显)归之于那些最卑贱的水手。背教

发表于:2019-03-10 / 阅读(112) / 评论(0)

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antimony pentoxydichloride