be made of 和 be made up of有什么区别桥由石头制成,是用be made of 还是 be made up of为什么?请用be made up of举例

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bemadeof和bemadeupof有什么区别桥由石头制成,是用bemadeof还是bemadeupof为什么?请用bemadeupof举例bemadeof和bemadeupof有什么区别桥由石头制

be made of 和 be made up of有什么区别桥由石头制成,是用be made of 还是 be made up of为什么?请用be made up of举例
be made of 和 be made up of有什么区别
桥由石头制成,是用be made of 还是 be made up of
为什么?
请用be made up of举例

be made of 和 be made up of有什么区别桥由石头制成,是用be made of 还是 be made up of为什么?请用be made up of举例
be made of指看得出原料的,如The bridge is made of stones.
be made from指看不出原料的,如Paper is made from wood.
be made up of更强调由一组里的某些部分构成,如Our class is made up of 50 students.

be made of
用...造成(用于原材料显而易见的场合)
be made up of
由...组成