雾与霾的成因不同、性质不同、影响不同，因此应对雾和霾的方法也不一样。这体现的哲理是（ ）
A：整体与部分相互联系
B：量变必然会引起质变
C：坚持具体问题具体分析
D：要集中力量解决主要矛盾
One soldier was killed and three others were ____ when their tank was hit by a rocket. (wound)
人体内主要完成物质运输功能的系统是( )
