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Practice Speaking: Read Aloud
ID: #52475
Long An oxygen
Instructions
Look at the text below. In 40 seconds, you must read this text aloud as naturally and as clearly as possible. You have 40 seconds to read aloud.
An oxygen concentrator is a medical device that concentrates oxygen from the Atmospheric air which contains about 78% nitrogen and 21% oxygen. The oxygen concentrator sucks this air, filters it through a sieve, releases the nitrogen, and works on the remaining oxygen. This oxygen, compressed and delivered by cannula, is 90-95 per cent pure.
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