What were two aspects of Song civilization that Kublai Khan kept in place? Isolationism Trade Routes Civil Service The capital

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explanation:

a because i tried to vote with just my college id and the answer was no

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the lines on a surface map are called isobars. isobars are lines of constant pressure which are measured in units called millibars. the numbers indicate the amount of air pressure, in millibars, that each line represents.