下列说法正确的是( )A.若ab>0,则a>0,b>0.B.若ab=0,则a=0 ,b=0.C.若ab>0且a+b>0,则a>0,b>0.D.a为任一有理数,则-a×a<0四个各不相等的整数a、b、c、d,他们的积abcd=9,那么这四个数的和是( )A.0 B
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![下列说法正确的是( )A.若ab>0,则a>0,b>0.B.若ab=0,则a=0 ,b=0.C.若ab>0且a+b>0,则a>0,b>0.D.a为任一有理数,则-a×a<0四个各不相等的整数a、b、c、d,他们的积abcd=9,那么这四个数的和是( )A.0 B](/uploads/image/z/6967105-25-5.jpg?t=%E4%B8%8B%E5%88%97%E8%AF%B4%E6%B3%95%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AF%EF%BC%88+%EF%BC%89A.%E8%8B%A5ab%EF%BC%9E0%2C%E5%88%99a%EF%BC%9E0%2Cb%EF%BC%9E0.B.%E8%8B%A5ab%3D0%2C%E5%88%99a%3D0+%2Cb%3D0.C.%E8%8B%A5ab%EF%BC%9E0%E4%B8%94a%2Bb%EF%BC%9E0%2C%E5%88%99a%EF%BC%9E0%2Cb%EF%BC%9E0.D.a%E4%B8%BA%E4%BB%BB%E4%B8%80%E6%9C%89%E7%90%86%E6%95%B0%2C%E5%88%99-a%C3%97a%EF%BC%9C0%E5%9B%9B%E4%B8%AA%E5%90%84%E4%B8%8D%E7%9B%B8%E7%AD%89%E7%9A%84%E6%95%B4%E6%95%B0a%E3%80%81b%E3%80%81c%E3%80%81d%2C%E4%BB%96%E4%BB%AC%E7%9A%84%E7%A7%AFabcd%3D9%2C%E9%82%A3%E4%B9%88%E8%BF%99%E5%9B%9B%E4%B8%AA%E6%95%B0%E7%9A%84%E5%92%8C%E6%98%AF%EF%BC%88+%EF%BC%89A.0+B)
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