Since 1993, death rates from AIDS in the United States have declined due to
A) ?a drop in the incidence of AIDS.
B) ?a shorter survival time of AIDS patients.
C) ?a decrease in the prevalence of HIV infection among heterosexual men.
D) ?a decrease in the prevalence of HIV infection among heterosexual women.
A
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Why does the human retina have a blind spot? a. That point is the border between the area with cones and the areas with rods. b. The pupil casts a shadow over the retina at that point
c. The optic nerve exits from the retina at that point. d. Exposure to bright lights quickly damages that point in the retina.
All of the following are examples of behaviors that may contribute to sleep problems EXCEPT a. smoking a cigarette before going to bed
b. getting out of bed if you are unable to fall asleep after a reasonable period. c. vigorous exercise an hour before bedtime. d. keeping the bedroom cold.
Deprivation dwarfism and failure to thrive are similar because both conditions
a. result from intentional physical abuse. b. arise from metabolic disorders of food digestion. c. relate to emotional deprivation and sparse affection. d. improve the child through the experience of "toughening.".
What has lessened the stigma associated with hearing aids?
a. They are less outwardly visible. b. Celebrities use them. c. They work so well. d. They are a sign of maturity.