单项选择题

A．To estimate the extreme weather.
B．To develop the satellite technology.
C．To improve agricultural output.
D．To learn how to change information to maps more efficiently.
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单项选择题
A．Soil.B．Human population.C．Forests.D．Water Supplies.
A．Soil.
B．Human population.
C．Forests.
D．Water Supplies.
单项选择题
Turner became extremely angry because ______.
A．he had to sell a large portion of his shares to Goldman at a loss
B．the merger covered the dissatisfactory financial results of AOL
C．American Online was found to have exaggerated its revenue
D．he lost billions of dollars in wealth due to the stock's going low
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