Primary treatment of wastewater includes
a. treating water with chemicals.
b. stirring and aerating water.
c. degradation of wastes by bacteria.
d. physical removal of contaminants.
Answer: D
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Of the Indo-European language family, Romance, Germanic, and Slavic are the three main branches of European languages
a. True b. False Indicate whether the statement is true or false
Major differences and often conflicts between highland and lowland inhabitants are common and are a part of regional history in many areas of the world. An example highland peoples at conflict with lowland peoples are the:
A) Kurds B) British C) French D) Canadians
Over ________ of volcanism is associated with the edges of tectonic plates.
A. 50% B. 90% C. 80% D. 60% E. 70%
Thunderstorms occur year-round in the:
A) subarctic regions. B) middle latitudes. C) subtropics. D) polar regions. E) tropics.