We had a long way to go so we decided to( )early.
A.
set on
B.
put on
C.
set off
D.
put off
正确答案是C
某企业产品产量与单位成本资料如题41表:要求:(1)建立单位成本对产量的直线回归方程。(2)当产品产量每增加1万件时,单位成本的变化情况。(结果保留两位小数)