I don't like the story book, because there is in it.
A:nothing interesting
B:anything interesting
C:interesting nothing
已知函数f(x)=axlnx,a∈R,若f′(e)=3,则a的值为____
如图是北美草原犬鼠洞穴的橫截面示意图.它有两个出口,洞口A表面隆起,洞口B表面平坦.则下列分析正确的是( )