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Americans might tend to inflate the influence of the United States in the history of the spread of English. Before the World Wars, particularly WWII, the US was a bit player on the world stage. The...

english quiz online

started by puzznbuzzus on 17 Feb 17 no follow-up yet

Flotation machine is the key equipment in the flotation process which can achieve the separation of minerals and gangue by inflating and mixing the prepared slurry, so the particles will attach to ...

Internet Explorer

started by betsy stone on 31 Oct 14 no follow-up yet