1.已知直线3x+4y−1=03x+4y-1=03x+4y−1=0与圆(x−1)2+(y−1)2=4(x-1)^{2}+(y-1)^{2}=4(x−1)2+(y−1)2=4相交于AAA,BBB两点,则弦长∣AB∣\vert AB\vert∣AB∣的值为((( )))