They aren't _______ at that age.
A:enough calm
B:enough calmly
C:calm enough
D:calmly enough
两码头相距s千米,一船顺水航行需a小时,逆水航行需b小时,那么水流速度为( )
容器
温度(℃)
H2(mol)
N2(mol)
催化剂
A
450
3
1
无
B
有
C
500
6
2
D
右边漫画体现的哲学道理有( )