This country became involved in the Korean War when the U.S. military pushed the North Korean forces back to its borders
A) China
B) Soviet Union
C) Mongolia
D) Vietnam
E) none of the above
Answer: A
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When a primary alcohol is oxidized to a carboxylic acid, an intermediate product is an aldehyde. Which physical property of the aldehyde can be exploited if it is desired to obtain the aldehyde as the reaction product?
A) boiling point B) molecular weight C) solubility D) any of these
When was the Last Glacial Maximum?
A) 18,000 years ago B) 10,000 years ago C) 100,000 years ago D) 32,000 years ago
Of the following renewable energy resources, which one has the highest life-cycle greenhouse gas emissions?
A. hydropower B. wind power C. solar power D. biomass
In an ecosystem, throughput can refer to
A. energy that originates in the system and flows out. B. the equilibrium state. C. matter that flows into the system but not out. D. something that can expand the size of state variables.