A:若m∥α,n∥α,则m∥n
B:若m∥α,m∥β,则α∥β
C:若m∥α,n⊥α,则n⊥α
D:若m∥α,α⊥β,则m⊥β
某次蔗糖溶解实验过程如图所示,不考虑水分蒸发,下列判断错误的是( )
化学用语是学习化学的重要工具,下列用来表示物质变化的化学用语中,正确的是( )
— People are crazy! experts say there is no use eating salt to prevent radiation(辐射), some people still don't believe it.