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Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

The purpose of lycees was to a: prepare male candidates for government jobs b: prepare male candidates for the napoleonic wars c: prepare female candidates for government jobs

What did the introduction of silk into the mediterranean do for the abbasid empire