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问题: 英语语法

atmospheric pressure can support a column of water up to 10 metres high.请分析一下整个句子成分, up to ....在这句话中做什么成分? up此处是副词吗? to 此处是介词吗?

解答:

atmospheric pressure主语
can support 谓语
a column of water 宾语
up to 10 metres high 介词短语修饰a column of water
"up to"高至…… 应该算一个固定搭配吧