He did finally come with us, although it took a long time to ____(说服) him.
下列错误的实验操作与“可能产生的后果”不一致的是()
若方程组4x+3y=14kx+(k-1)y=6的解中x与y的值相等,则k为( )
下图为某地地质剖面图,该地区( )