-- Let's go swimming.
-- .
A:It's a pleasure
B:You're welcome
C:Thanks a lot
D:It's a good idea
Jennifer is five years old now and she can dress h ____ every morning.
下列说法中正确的是( )
我国著名学者刘勰说:“信者行之基,行者人之本,人非行无以成,行非信无以立。”他这句话告诉我们( )
当血液经过肺泡周围毛细血管时,血液中的氧含量发生变化,正确表示该变化的曲线( )