单项选择题

A．Some people pretend to know what they really don’t.
B．What the woman said is true.
C．What the woman said is wrong.
D．He knows more than the woman does.
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填空题
According to the passage Icelanders all swim outdoors in cold weather, are they really superior hardiness
单项选择题
Satellite television providers can bring dozens or even hundreds of channels to TV viewers because______.
A．satellite can send more programs
B．the television signals sent to satellites are compressed
C．the signals are encrypted
D．the signals converted back into usable data
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