Approximately what percentage of the electricity produced in the United States comes from nuclear energy?
A) 5%
B) 15%
C) 35%
D) 55%
B
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80% of Russia's immigrants are from ___________ ; although a growing number of workers are from ____________
A) Southwest Asia and North Africa; Eastern Europe B) China; Central Asia C) Former Soviet republics; Central Asia D) Eastern Europe; Taiwan E) China and the former Soviet republics; SubSaharan Africa
A precipitation droplet with a diameter of 0.25 mm would be classified as rain
Indicate whether the statement is true or false
Which of the following best matches the description?Biome that lacks trees and has permanently frozen soil.
A. marsh B. biochemical oxygen demand C. benthic D. boreal forest E. phytoplankton F. periphyton G. grassland H. pioneer community I. pelagic J. desert K. euphotic L. littoral zone M. savanna N. deciduous forest O. tundra
The cP air mass of North America is usually associated with a source region in ____
a. Iceland b. Aleutian Islands c. Mexico d. Canada