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(2002•盐城)在-π,-2,,cos45°,3.14,()中,有理数的个数是...
(2002•盐城)在-π,-2,
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,cos45°,3.14,(
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)
中,有理数的个数是( )
A.2
B.3
C.4
D.5
考点分析:
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