— Yes, _____ is it?
A:important anything; When
B:important something; What
C:anything important; When
D:something important; What
当x=0.04时
6x-x____0.25 6x+x____0.25
平均海拔在4000米以上,是世界最高的大高原,素有“世界屋脊”之称( )