There are _______ things in your room. Stop buying anything until you can clean up your room.
A:so many
B:less
C:too much
D:so much
如图是一个正方体的表面展开图,则图中“西”字所在面的对面所标的字是( )
学习化学知识后,观察物质世界就要从化学视角看.下列对打火机主要燃料丁烷(C4H10)的看法不正确的是( )
已知tanθ=2,则sin2θ+sinθcosθ﹣2cos2θ=( )