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Q. The resources which can be used continuously, yr-after -yr are called
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Q. The average salinity of seawater is
Q. Which type of waves are used by a ‘RADAR’ for detecting the presence of an aircraft?
Q. Which metal pollute the air of a big city?
Q. Which of the following tests is used for the diagnosis of ‘Colour-Blindness’ in people ?
Q. Which among the given is a commercial source of energy
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