A:若m∥α,n∥β,m⊥n,则α⊥β
B:若m∥n,n∥α,α∥β,则m∥β
C:α∥β,m⊥α,n∥β⇒m⊥n
D:若α⊥β,α∩β=n,m⊥n,则m⊥α
— Are you cleaning my room, Serena?
— ______. I can't bear seeing your room in a mess!
分式x2-9x-3的值为零时,则x的值为( )
下列关于动物细胞及组织培养的说法错误的是( )
“黄变米”中含有____ ,能够导致中毒,和肝癌.