一 She wears a pink skirt today.
一 Yes. beautiful she looks! The skirt is made silk.
A:What; of
B:How; from
C:How; of
甲:____;乙:____.
已知曲线y=13x3+43,
(1)求f′(5)的值;
(2)求曲线在点P(2,4)处的切线方程.
挂在墙上的中国地图与课本上的中国地图____ 相似的图形.