A:新石器时代
B:铁器时代
C:青铜器时代
已知,函数y=(1﹣3k)x+2k﹣1,试回答:
(1)k为何值时,图象过原点?
(2)k为何值时,y随x增大而增大?
Tell me more ____the Great Wall.
— How do you come to school?
— I often come ____ ____.