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    The pressure of this gas pipe is greater than__________.

    A.the gas pipe　　　　　　　　　　　　　 B.of the gas pipe

    C.that of the gas pipe　　　　　　　　　 D.those of the gas pipe

     

    C

    为了避免重复，连词as和than后面的比较状语从句虽然可以作某些省略，但比较成分不能省略，否则会引起误解。如这里比较的是pressure，所以后面要用that来代替这个名词。如果代替的是复数名词，则用those。

     

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