标签:水和酒精分子 相关文章
Technology Report - IBM Says Computers Will See, Taste, Smell, Touch and Hear Things Better 科技报道 - IBM预测5年内改变世界的五大新技术 From VOA Learning English, this is the Technology Report in Special English. 这里是美国之音
Iraqi President: Extremists Have United Iraqi Factions 伊拉克总统称极端主义分子团结了伊拉克各派系 Iraqi President Fouad Maasum said the barbarity of the militants who have taken control of one-third of Iraq and a part of Syria ha
Security forces in Pakistan have begun an operation against pro-Taliban militants in a tribal region bordering Afghanistan and serving as a major route for trade and supplies to U.S-led foreign forces based there. The offensive has provoked an al-Qai
How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a
Popcorn Makes A Perfect, Healthy Snack Dear A Moment of Science, I love to snack, but I also want to lose weight. The problem is, I really hate vegetables and fruit, at least as snack foods. I want something with a little salt, a little crunch. So ar
Why Does Plastic Wrap Cling To Itself? What makes kitchen plastic wrap cling so maddeningly to itself, and so conveniently to the sides of bowls and plates? Plastic wrap clings for two reasons: its elastic and its sticky. That probably seems pretty o
By Deborah Block Iskandariyah, Iraq 26 February 2008 For more a year, the U.S. military in Iraq, with its reinforcements, has been on the offensive in an effort to wipe out insurgents from their strongholds. The Bush administration claims the surge,
By Anjana Pasricha New Delhi 18 January 2006 India says it is optimistic about its peace process with Pakistan after holding two days of talks with its nuclear rival. But India has accused Pakistan of
By Sonja Pace Jerusalem 24 July 2006 Israeli Foreign Affairs Minister Tzipi Livni, right, meets U.S. Secretary of State Condoleezza Rice in Jerusalem Secretary of State Condoleeza Rice is in Israel for talks on how to end the conflict with Hezbollah
1. A wildfire in southern California, San Jacinto, mountains has grown to nearly 30 square miles. But the fire fighters say they are making progress. The blaze is almost half contained and several evacuation orders have now been lifted. The fire has
By Tom Rivers London 07 October 2009 Ada Yonath (file photo) Two Americans and one Israeli share this year's Nobel Prize in Chemistry for their work showing how the DNA code is translated into life itself. Americans Venkatraman Ramakrishnan and Thom
Officials say up to 49 Taliban insurgents and five Afghan soldiers have been killed following an attack by the Taliban in the eastern Afghan province of Paktiya. One soldier was captured during the fighting. Several foreign militants were also involv
俄欲与美联手打击叙反叛分子 美体操女将西蒙强势扫4金 时间:2016-08-21 08:34来源:未知 作者:voa365 点击: 149 次 音频下载 BBC news with Jonathan Izard. Russian bomber plans have begun using an airbase in Iran to launc
Rev Up Photosynthesis To Boost Crop Yields 提高光合作用能使作物增加产量 Photosynthesis is surprisingly inefficient, only of the order of one to two percent. And one of the main culprits is an enzyme called RuBisCo. 光合作用效率低得
What is Air? 空气 D: Strictly speaking, air is mostly nitrogenabout seventy-eight percent, and about twenty-one percent oxygen, which leaves about one percent of other stuff, like water vapor and carbon dioxide. Y: So air is mostly empty space? D:
今天我们要学的词是restore。Restore, 意思是恢复。索马里正在集中力量打击恐怖组织青年党。 The fight against al-Shabab militants presents a historic opportunity to restore peace in Somalia, 对青年党的打击为恢复索
Robot Attack 纳米机器人的研制属于分子仿生学的范畴,它根据分子水平的生物学原理为设计原型,设计制造可对纳米空间进行操作的功能分子器件。纳米生物学的近期设想,是在纳米尺度上应用
The Oldest Sweetener, the Freshest Bread 蜂蜜成分75% 以上为糖类。据市场调查,90% 以上的人都认为蜂蜜与砂糖、异构糖、饴糖、人工甜味剂相比对人体健康更为有益。蜂蜜不仅是天然甜昧剂, 而且