高三英语24(break down&break up)It is natural that after many years rocks are broken ____ into dirt.答案是down.

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高三英语24(breakdown&breakup)Itisnaturalthataftermanyyearsrocksarebroken____intodirt.答案是down.高三英语24(brea

高三英语24(break down&break up)It is natural that after many years rocks are broken ____ into dirt.答案是down.
高三英语24(break down&break up)
It is natural that after many years rocks are broken ____ into dirt.
答案是down.

高三英语24(break down&break up)It is natural that after many years rocks are broken ____ into dirt.答案是down.
这两个都是物理分解.
它们的区别是:break down只能指分解零件(如拆洗衣机等);break up既可指分解零件,又可指把一种物质分解成碎片或分离出某种物质(如从空气中分离氧气、从金子和沙子的混合物分解出金子等).
化学分解可以是decompose.

break down这两个意思都有
但break up我不记得有分解的意思啊……

是风化,是一个复杂的物理和化学变化