选出恰当的应答语。
A.Thanks!
B.No,it isn't.
C.It's a toy car.
D.OK!
E.It's under the book. (1) ____ (2) ____ (3) ____ (4) ____ (5) ____
直线l:y=kx﹣1与曲线C:x2+y2﹣4x+3=0有且仅有2个公共点,则实数k的取值范围是( )
俗话说:“人有人言,兽有兽语”蜜蜂是用哪种“语言”进行交流的( )