Family planning means enabling people to
A. Have many children
B. Decide in advance how many children they should have
C. Have no children
D. Have fewer children so that the population growth rate can reach ZPG
E. Have more children if they live in a country with a birth dearth
Answer: B
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The light-color layers within a typical gneiss are formed by ________.
A. pyroxenes B. amphiboles C. calcite D. feldspars E. olivine
Which of the following statements is not true?
A. Human activities may increase the dangers from certain geologic hazards. B. Some environmental problems, such as those related to pollution, were unrecognized until very recently. C. Certain problems, such as resource shortages, will become less severe when other planets or the moon are colonized in the next few decades. D. Many geologic hazards have existed throughout human history.
Globally, the world's ratio of reserves to annual production for oil, gas, and coal are currently:
A) 51, 57, and 125 years respectively B) 11, 17, and 75 years respectively C) 125, 154, and 51 years respectively D) 51, 125, and 57 years respectively E) 125, 51, and 57 years respectively
The average summer temperatures in the Southern Hemisphere are cooler than the average summer temperatures in the Northern Hemisphere because ____
A) Earth is closer to the sun in January B) Earth is farther from the sun in July C) over 80% of the Southern Hemisphere is covered with water D) the sun's energy is less intense in the Southern Hemisphere