单词:ion exchange filtration
单词:ion exchange filtration 相关文章
Beijing will launch a pilot program to equip schools and kindergartens with air filtration devices. Smog has been a significant issue in the Chinese capital this winter. I was coughing just now, I always wear mask, from school to home. The air is cho
By Mario Ritter Broadcast: November 7, 2003 This is Bob Doughty with the VOA Special English Economics Report. The largest 1)stock market in the world is the New York Stock Exchange. It is also the ol
Occupy Wall Street Protesters Hold 'Day of Action' Two days after a court ruling closed the Occupy Wall Street encampment in New York, the protesters held a Day of Action -- not only in New York but other cities across the nation Thursday. The protes
Venezuelan Election is Again Choice Between Socialism, Capitalism Business has not been good for Rotzen Villabon, who owns a gift shop called Viqiu. He needs dollars to import products made in China but he can't find any at the official exchange rate
By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica
China, Russia vow to advance cultural exchange