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According to the passage, what do the human beings depend on to structure the world in important ways
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A．Ozone is an extremely inactive gas.B．Ozone only exists in the upper atmosphere.C．Ground-level ozone is closely related to people’s health.D．Children breathe more air per pound of body weight than adults.
A．Ozone is an extremely inactive gas.
B．Ozone only exists in the upper atmosphere.
C．Ground-level ozone is closely related to people’s health.
D．Children breathe more air per pound of body weight than adults.
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