The writer advised us ________ more.
— What do they do on Sunday afternoon?
—They take a d____ class in the gym.
分析下表中各项的排布规律,按此规律排布第26项应为( )
1
2
3
4
5
6
7
8
9
10
C2H4
C2H6
C2H6O
C2H6O2
C3H6
C3H8
C3H8O
C3H8O2
C4H8
C4H10
战国初年,晋国的卿大夫瓜分了晋国,形成的三个国家是( )
下列关于进入青春期应做到的事项中,错误的是( )