Now students, ______ your plans for the coming year.
A:writing down
B:write down
C:to write down
D:wrote down
f(x)=ax3+3x2+2,若f′(﹣1)=3,则函数在x=﹣1处的切线方程为( )
“你耕田来我织布,我挑水来你浇园。”这两句歌词反映了我国小农经济状态下的生活情境。下列有关古代小农经济基本特点的表述,不正确的是( )