In designing a retaining wall to support an unstable slope, the best design would be
A. any of these; all would be equally effective.
B. a high, thin, impermeable wall.
C. a high, thin wall with drainage holes.
D. a short, stout wall at the foot of the slope.
Answer: D
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A very comprehensive and effective hazardous-waste collection and detoxification program is in
a. France b. Denmark c. Norway d. Yugoslavia e. the United States
Describe how carbon monoxide is produced by both humans and nature. Then discuss why it is so toxic to humans
What will be an ideal response?
The most important pull factor for migrants to North America today is
A) economic. B) environmental. C) forced. D) political. E) geomagnetic.
Pat and Terry are considering moving from near the center of a large city into the suburbs. Which of the following discussion points is valid?
A) If they stay in the city, they will contribute more to local pollution. B) They'll experience more stress if they move to the suburbs. C) It will be easier to have a place for a vegetable garden if they move to the suburbs. D) If they move to the suburbs, it will cost much less for transportation. E) If they stay in the city, they'll probably get less exercise.