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选错超难语法分析--pressure can,为什么?

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/10/02 19:21:59
选错超难语法分析--pressure can,为什么?
The sounds used in human languages to create meaning consist of small variation in air pressure can be sensed by the air.
pressure which can be sensed...这样can be sensed 就作从句的谓语了
consist 已经是句子的谓语了,主句不可以有2个谓语动词