Most major landslides:a
are caused by earthquakes.
b. are caused by volcanic eruptions.
c. have natural causes.
d. are due to human activity and poor engineering.
e. none of the these
C
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For decades since the middle of the 20th century, rural Chinese stayed in rural areas primarily because
A) of religious reasons. B) they needed to stay there to take care of their elders. C) they were obligated to stay under a centuries-old feudal system. D) the government forced them to stay.
How many atoms are in the smallest anhydride?
A) 5 B) 7 C) 9 D) 11
International voluntary migration
A) is insignificant now compared to prehistoric times. B) is most likely to be from the periphery to the core. C) is done typically for religious reasons. D) is usually coordinated by the United Nations. E) is both insignificant now compared to prehistoric times and is now done typically for religious reasons.
The average temperature increase in the shallow crust (the geothermal gradient) is about ________ degrees C per kilometer.
A. 2 B. 25 C. 10 D. 5 E. 15