单项选择题

A．There was crystal in all glass.
B．Lead crystal makes good glass.
C．Crystal is as hard as skyscraper.
D．In ordinary glass, the atoms are ordered.
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单项选择题
A．The temperature.B．The amount of water falling.C．Colder weather than usual.D．The disasters.
A．The temperature.
B．The amount of water falling.
C．Colder weather than usual.
D．The disasters.
单项选择题
A．It is time-consuming.B．It provides harmful programs.C．Its viewers are passive to the presented programs.D．Its entertainment is limited.
A．It is time-consuming.
B．It provides harmful programs.
C．Its viewers are passive to the presented programs.
D．Its entertainment is limited.
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