下列长度的三条线段能组成三角形的是( ) A．1cm， 2cm， 3．5cm

下列长度的三条线段能组成三角形的是( )

A．1cm， 2cm， 3．5cm B．4cm， 5cm， 9cm

C．5cm，8cm， 15cm D．6cm，8cm， 9cm

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下列长度的三条线段能组成三角形的是( ) A．1cm， 2cm， 3．5cm

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