单项选择题

How is television different from radio

A．Sound is changed into electromagnetic waves.
B．Light is changed into electromagnetic waves.
C．Both sound and light are changed into electromagnetic waves.
D．Either sound or light is changed into electromagnetic waves.
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单项选择题
From which languages is the word television taken
A．Greek and English.
B．Latin and English.
C．Greek and Latin.
D．English and Japanese.
单项选择题
What can we know about the laptop computer program that allows students to do schoolwork any where they want
A．The program is not workable.
B．The program is workable.
C．The program is too expensive.
D．We don't know the result yet.
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