A common measure of a nation's telecommunications infrastructure is
A) Internet
B) radio
C) Internet connections
D) telephone
E) telegraph
D
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What is an earthquake?
A. a release of energy B. a fault C. a seismic wave
Which of the following is true about levees?
A) They are a reliable way to protect an area from flooding. B) To be called a levee, a feature needs to be at least partly constructed by humans. C) A levee can trap water on the floodplain after the flood has subsided. D) None of these are correct.
________ was a sustained attack on Chinese traditions and cultural practices
A) The Long March B) The Great Leap Forward C) The Cultural Revolution D) The Four Modernizations E) none of the above
In the last 50 years of the 20th century, world population grew from ________ billion to over 6 billion.
A. 2.5 B. 4 C. 3.5 D. 5 E. 3