Underground mines do not cause disturbance of the land surface except at the mine entrance, either during or after mining.
Answer the following statement true (T) or false (F)
False
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The perfect pesticide should have a short half-life.
Answer the following statement true (T) or false (F)
During the 1950s land ownership was abolished and collectives were established to be followed by the creation of People's Communes in China. The result:
A) Increased productivity led to export surpluses. B) Land dedicated to vegetables and fruits, much of it converted from grain fields, increased 393 percent. C) The per capita consumption of meat in China increased from 12 pounds to 62 pounds. D) The deaths of some 14–26 million people from famine-related illness and starvation occurred.
Which of the following molecules can have only London dispersion forces?
A) CH4 B) CO2 C) both a and b D) neither a nor b
Which of the following diseases have been largely eradicated by the use of vaccines?
A) rubella B) polio C) smallpox D) All of these have been largely eradicated through the use of vaccines. E) None of these have been largely eradicated through the use of vaccines.