在我国历史上,为救民于危难,“劳身焦思,三过家门而不入”的是下列哪一位( )
A:女娲
B:尧
C:舜
D:禹
Kate wants some milk. Could you give____to____?
In 1989, Audrey made her final ____ (appear) in films.
下面关于细胞有关知识叙述错误的是( )
设 Pn(xn,yn)是直线2x﹣y=nn+1(n∈N*)与圆x2+y2=2在第一象限的交点,则极限limn→∞yn-1xn-1=( )