What is a feature of baby talk?
A speaking with exaggerated intonation patterns
B speaking with lower pitch
C using long words
D speaking quickly and softly
E using complicated syntactic structures
A
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Economies of scale are often associated with ________.
A) an upward shift in its long-run average cost curve B) decreasing returns to scale C) increased specialization D) increased complexity and bureaucracy
The period of time that a groom spends in service to the bride's family as a form of economic exchange for marriage is called:
a. a leveling mechanism. b. marriage transaction. c. bride service. d. bride wealth. e. dowry.
All the original Homo erectus fossils discovered at Zhoukoudian during the 1920s and 1930s
a. are now housed in a museum in Beijing. b. disappeared during World War II. c. are kept in a small museum near Zhoukoudian. d. were destroyed in a fire in the 1970s. e. are available for study at Cambridge University.
Geographic separation is an important factor in ________ speciation.
a. allopatric b. parapatric c. anagenesis d. sympatric