How did civilizations that were far from rivers support agriculture and how did this affect their development?

How did civilizations that were far from rivers support agriculture, and how did this affect their development? ... They built canals to bring water to crops, which gave them a surplus to support a growing civilization.

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there is no universal method for handling incomplete data in a clinical trial. each trial has its own set of design and measurement characteristics. there is, however, a set of six principles that can be applied in a wide variety of settings.

the eop relieves the president of the duty of serving as commander in chief. the also eop reduces the president's ability to appoint staff and advisers.

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