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问答题
Order was caused by the need and desire to survive the challenge of the environment. This orderly condition is called the slate , and the roles that maintained it, the law . With time the partner to this tranquility, man marched across the centuries of his evolution to the brink of exploring the boundaries of his own galaxy. Of all living organisms, only man has the capacity to interpret his own evolution as progress. As social life changed, the worth and fights of each member in the larger group, of which he was a part, increased. As the groups grew from clans to civilizations, the value of the individual did not diminish but became instead a guide to the rules that govern all men.
单项选择题
Why does macular degeneration cause blindness and other vision problems
A．Macular degeneration causes improper interpretation by the brain.
B．Macular degeneration makes the retina less sensitive to the light.
C．Macular degeneration changes the functions of rods and cones.
D．Macular degeneration is the result of inadequate supply of blood in the retina.
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