—why not go for a picnic this Sunday?
—That wonderful!
A:sounds
B:tastes
C:looks
D:smells
若4x2+ax+1是一个完全平方式,则a的值为( )
如图,若正方形OABC的顶点B和正方形ADEF的顶点E都在函数y=1x(x>0)的图像上,则点E的坐标为( )