—It makes me uncomfortable,so I don't need it.
冷战结束后,威胁世界安全的因素有( )
如图所示,已知∠1=∠2,∠3=∠4,∠5=∠C,求证:DE//BF
正方体ABCD-A1B1C1D1,棱长为2,点A1到截面AB1D1的距离为( )
I still remember ________ to the Famen Temple and what I saw there. ( )
变量x与y之间的关系是y=12x2﹣1,当自变量x=2时,因变量y的值是( )