单项选择题

A．political
B．special
C．financial
D．individual
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单项选择题
A．Uses of cold sea water.B．Irrigating desert areas.C．Techniques for preserving the environment.D．Techniques of cultivating
A．Uses of cold sea water.
B．Irrigating desert areas.
C．Techniques for preserving the environment.
D．Techniques of cultivating
单项选择题
A．To transport water to higher place.B．To transport vegetables quickly.C．To bring nutrients to the soil.D．To adjust the soil temperature.
A．To transport water to higher place.
B．To transport vegetables quickly.
C．To bring nutrients to the soil.
D．To adjust the soil temperature.
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