灾难:威尼斯水灾
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显微技术
显微技术The Microscopic Technique Each advance in microscopic technique has provided scientists with new perspectives on the function of living organisms and the nature of matter ...
灾难:北极冰层融化
灾难:北极冰层融化Research into the icecap of North Pole has found that it is melting so quickly than Arctic Ocean could lose most of ice during summer time in as little as ten years. Scientists ...
医疗:世卫组织称海地流行病风险增加
医疗:世卫组织称海地流行病风险增加The World Health Organization says it is worried about an explosion of diseases in Haiti. It says people are at great risk of getting diarrhea, cholera and other...
晨读美文060
晨读美文 人名:FranklinFranklin’s life is full of charming stories which all young men should know —how he peddled ballads in Boston, and stood, the guest of kings, in Europe; how he worked h...