The past two decades have witnessed great changes in information technology（翻译)

To Britons, mobile phones have been the greatest invention in the past decade.A．YB．NC．NG

What is the main idea of the passage？A．Ice covers have been diminishing for the past decad

A major aspect of many firms marketing strategies over the past decade have been the dev

Americans circle of close confidants has shrunk dramatically in the past two decades but

Over the past two decades, the popularity of the bicycle as a mean of transportation and r

For the past two years I have been working on students evaluation of classroom teaching.