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．It keeps viewers informed about new science and politics.B．It brings originality to our modem life.C．It improves viewers’ ability to make correct judgment.D．It has moving pictures to make the programs vivid.
A．It keeps viewers informed about new science and politics.
B．It brings originality to our modem life.
C．It improves viewers’ ability to make correct judgment.
D．It has moving pictures to make the programs vivid.
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non-publicly
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