影响我国小学社会课程内容选择的因素主要有社会因素、教师因素和学科因素。()

A. The change from a hunting and fishing society to an industrial society sometimes causes a dramatic increase in a society"s crime rate.
B. Even in a hunting and fishing society, some proportion of the society"s members will choose to commit suicide.
C. According to official government records, most of those who committed suicide in Greenland in 1987 were male.
D. The life expectancy of Greenland"s inhabitants was not much greater in 1987 than it was in 1960, before the societal change occurred.
E. In 1987 most suicides that occurred in Greenland were reported as suicides to the appropriate government office, whereas in 1960 most were not.

A. The expected rise in average global temperatures has not yet been observed.
B. Ocean waters absorb carbon dioxide at a greater rate when the atmospheric concentration of carbon dioxide is higher.
C. Since the beginning of the Industrial Revolution, increased atmospheric concentrations of carbon dioxide have resulted in improved agricultural productivity.
D. When plants decay, they produce methane, another gas that can have a marked greenhouse effect.
E. The fact that carbon dioxide levels have risen and fallen many times in the Earth"s history suggests that there is some biological process that can reverse the greenhouse effect.