Passion is passion and it doesn't matter____ it's directed. Exactly, it can be coins or sports or politics.
A:why
B:how
C:whether
D:where
城市水土流失对行洪排涝的影响有( )
物理知识渗透于我们的生活,以下警示语中与惯性知识无关的是( )
儿童易患佝偻病,是因为儿童正处于生长发育期更需要( )