单词:cycloidal type rotary index units
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Lesson 38 Text A Can't She Type? The well-known banker, T. J. Ellington, was at one time in his younger days the manager of a New York office. His secretary had been with him for many years, and knew
[00:00.00] Unit 2 [00:03.08]1.Listen and choose the words you hear. [00:32.03]2.Listen and choose the sentences you hear [00:51.20]3.Listen and write the misssing words. [01:28.27]4.Listenand choose the corrrect answers [02:25.95]5.Listen and answer
By Derek Kilner Nairobi 16 June 2008 A battalion composed of troops from Sudan's northern and southern armies is set to deploy Tuesday to the disputed Abyei area on the country's north-south border. As Derek Kilner reports for VOA's East Africa bure
SCIENCE IN THE NEWS - Fight to End Polio a Story of Unexpected Problems, but Also Progress Over the years, polio experts have had to learn to deal with surprises. Transcript of radio broadcast: 03 March 2008 VOICE ONE: This is SCIENCE IN THE NEWS in
This is the VOA Special English Development Report. An Afghan girl receives a dose of polio vaccine The World Health Organization has begun to use a new vaccine against polio. Officials say it will become a major tool in the campaign to end a disease