The weight of a male lion can reach 240 kg, _____ an adult man.[]
A:three times the weight of
B:the three times weight of
C:as heavy as three times
D:as three times heavy as
①若m⊥α,n⊥α,则m∥n;
②若α∩γ=m,β∩γ=n,m∥n则α∥β;
③若α∥β,β∥γ,m⊥α,则m⊥γ
④若γ⊥α,γ⊥β,则α∥β.
其中正确命题的序号是( )
下列加线词的解释正确的一项是 ( )