The m values in polylines represent:

A. the number of points that make up a line segment
B. the linear measure along a route
C. the symbol of a route
D. the length of a line segment


Answer: B

Environmental & Atmospheric Sciences

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Which of the following was a major influence on the shaping of European cities?

A) Roman influence on town layout B) careful planning C) the presence of defensive walls D) the value of land prices in the city E) urban ideas brought from Central America

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A lake that is described as oligotrophic is typically

a. low in primary productivity b. low in plant nutrients c. high in plant nutrients d. both low in primary productivity and low in plant nutrients e. both low in primary productivity and high in plant nutrients

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Which of the following is not a difference between the Mississippi River Basin and the Great Basin?

A) One empties into the ocean and the other does not. B) One has more streams than the other. C) One is much larger than the other. D) One experiences evaporation and the other does not.

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Researchers estimate that black carbon may account for about one-half of all global warming

a. True b. False

Environmental & Atmospheric Sciences