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The convex mirrors on a school bus are used primarily to:
a.See far down the highway behind you
b.Read the dashboard instruments
c.Give a wide-angle view of the danger zones and children near the bus
d.Check tire pressure while driving
解析
Convex mirrors give a wide-angle, close-up view of the sides of the bus and the danger zone areas where children may be present. They make objects appear smaller and farther away than they really are. They are essential for spotting a child close to the bus who would otherwise be hidden.
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