Ullman's model of spatial interaction emphasizes three essential conditions. Which of the following is not one of them?
A. complementarity
B. intervening opportunities
C. gravity
D. transferability
Answer: C
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Fill in the blank(s) with the appropriate word(s).
Which soil profile contains material leached from other horizons?
A. A B. B C. C D. D
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Indicate whether the statement is true or false
Weather forecast that predicts that the future weather will be the same as the present weather is called
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