四大文明古国，都对应着世界四大文明发源地，古中国的发源地为（ ）。 A: Yellow River basin B: Yangtze river basin C: Mesopotamia D: Huaihe River basin
四大文明古国，都对应着世界四大文明发源地，古中国的发源地为（ ）。 A: Yellow River basin B: Yangtze river basin C: Mesopotamia D: Huaihe River basin
中国南北方的天然分界线是（）The natural boundary between the north and the south of China is ( ) A: 长江Yangtze River B: 珠江Pearl River C: 秦岭-淮河一线Qinling Huaihe line D: 黄河Yellow River
中国南北方的天然分界线是（）The natural boundary between the north and the south of China is ( ) A: 长江Yangtze River B: 珠江Pearl River C: 秦岭-淮河一线Qinling Huaihe line D: 黄河Yellow River
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