General Knowledge :: World Geography
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The northern portion of the western coastal plain is called
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The ozone layer at high altitude contains
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The number of a topographic map is 47A/16/NW. Its scale must be
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The right ascension is the equivalent of longitude on the celestial sphere, and it is given in the units of
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The radiation belts are zones in space around the
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The periods of different eras are further divided into
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The Plio-Pleistocene boundary lies about ____ years ago, at the beginning of the interval of warming after the last Pleistocene glaciations.
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The production of wheat has increased mainly due to
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