Read the following passage and answer the question. One the face of it, telescopes and data bases sound like very different things. Telescopes sit on the top of mountains, and are pointed at the skies; data bases sit on computer hard disks, humming away, and going no where. Yet they have something in common; both allow astronomers to explore the universe. Modern telescopes are highly automated pieces that produce reams of observational data. Such data can be stored, precessed and distributed just like other digital information. This astronomer actually to visit a telescope to make observation. ‘Data bases sit on computer disks, humming away’ implies-
Answer: D - Data bases make soft sound but are working away
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