△ABC的顶点A(3,4),B(6,0),且∠A的内角平分线AT所在的直线方程为7x﹣y﹣17=0,则边AC所在的直线方程是( )
A:x﹣2y+5=0
B:2x﹣3y+6=0
C:3x﹣4y+7=0
D:4x﹣5y+8=0
当CO和CO2两种物质所含氧元素的质量相等时,两种物质的质量比为 ____.
Peter: Mom. ()
Mom: Nice to meet you, Mike.
Mike: Nice to meet you, too.