Nuclear fusion is a(n) ________ technology.
A. Ideal but so far unachievable
B. Proven and common
C. Clean, efficient, and relatively inexpensive
D. Long-time standard
E. Technologically easy but publicly objectionable
Answer: A
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Which kind of mining technique has the potential to dramatically reduce water and air pollution?
What will be an ideal response?
The German Meteor expedition, which explored the South Atlantic, was the first to use what innovation in depth
profiling? a. Deep-sea drilling b. Remotely operated vehicle c. Echo sounder d. Nuclear submarine e. Global Positioning System
Which type of aquifer is most common in the United States?
A) sand and gravel B) igneous and metamorphic rock C) sandstone D) limestone
The ________ segment of the San Andreas fault is the only one not to have a long rupture in historic time. In prehistory, it has ruptured every 250 years on average, but the last big movement was in 1690.
A. southern B. middle C. "creeping" D. northern