某实验小组用一凸透镜做“探究凸透镜成像规律”实验,进行了以下实验步骤:
-- I’m thirsty. I want something to drink. What about you?
-- OK, let's go and buy some _________.
已知直线y=kx(k>0)与函数y=sinx的图象恰有三个公共点Ax1,y1,Bx2,y2,Cx3,y3,其中x1<x2<x3,则有( )