读《鸟鸣涧》,王维的山水诗多以画入诗,这首诗描写了____、____、____、____等景物,通过衬托的手法,突出了山涧的____
–Which hair band do you like best, madam?–I can't decide now. I really don't know _________.
若圆O:x2+y2=4与圆C:x2+y2+4x﹣4y+4=0关于直线l对称,则直线l的方程是____