Your pocket money can be used to _____ charity, you used to _______ a lot on snacks.
A:supporting; spend
B:support; spending
C:support; spend
D:supporting; spending
下面对相关系数r描述正确的是( )
“更无柳絮因风起,惟有葵花向日倾”.该诗句描写的生命现象是( )
下列对文章有关内容的赏析,不恰当的一项是( )