A.2對(duì) B.3對(duì) C.4對(duì) D.5對(duì) 查看更多

 

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.對(duì)于分式,當(dāng)=          時(shí),分式值為0,當(dāng)=        時(shí),分式無(wú)意義.

 

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.對(duì)于分式,當(dāng)=         時(shí),分式值為0,當(dāng)=       時(shí),分式無(wú)意義.

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.對(duì)于分式,當(dāng)=          時(shí),分式值為0,當(dāng)=        時(shí),分式無(wú)意義.

 

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.對(duì)于分式,當(dāng)=         時(shí),分式值為0,當(dāng)=       時(shí),分式無(wú)意義.

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.對(duì)于分式,當(dāng)=         時(shí),分式值為0,當(dāng)=       時(shí),分式無(wú)意義.

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