单项选择题
A.expose the fragile ecological conditions which modern irrigation technologies must ameliorate
B.argue that new irrigation technologies would ultimately be less efficient than a reconfiguration of the North American diet
C.argue that efficient water-use is dependent upon a mixture of various modern methods
D.provide an overall view of possible methods for lessening the strain on sources of freshwater
E.describe the cycle by which aquifers are depleted and then replenished through technology
单项选择题 The passage implies that the strain on freshwater aquifers caused by poor irrigation patterns may be reduced by all of the following methods EXCEPT()
单项选择题 It can be inferred from the passage that low-pressure sprinklers would be more preferable to high-pressure models for which of the following reasons()
单项选择题 Most nearly parallel, in its fundamental approach to the drip system solution described in the passage would be a machine designed to()