单项选择题

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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单项选择题
A．Ask for some pills to stop it.B．Punish children for their misconduct.C．See the doctor first.D．Dry the beddings as soon as possible.
A．Ask for some pills to stop it.
B．Punish children for their misconduct.
C．See the doctor first.
D．Dry the beddings as soon as possible.
填空题
The emotional aspects of an object are______than its physical aspects in that they help us adapt our behavior to the world surrounding us.
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