CAT里的一个语法题

考700的河

Technological innovations such as the internet, which proliferated at a pace seemingly unique in the 21st century, were in fact similar to the explosion of new technology during the industrial revolution that drastically changed life in analogous ways in the 18th century.
        
A. Technological innovations such as the internet, which proliferated at a pace seemingly unique in the 21st century, were in fact similar to the explosion of new technology during the industrial revolution that
B. The impact of technological innovations such as the internet, which proliferated in the 21st century at a pace that may seem unique, was similar to that of the explosion of new technology during the industrial revolution and
C. The pace at which technological innovations such as the internet have proliferated in the 21st century may seem unique, but it is similar to the industrial revolution’s new technology, which exploded and
D. The pace at which technological innovations such as the internet proliferated is seemingly unique in the 21st century, but the industrial revolution provided an explosion of new technology and
E. The pace at which technological innovations such as the internet have proliferated may seem unique to the 21st century, but the industrial revolution provided an explosion of new technology that
OA：E
求问E里at which是啥意思？E里面前半句的主语是peace还是innovations？做题的时候觉得peace是主语后面是have就排除了E，如果have proliferated是innovations的谓语的话，前半句不就run-on了吗？

考700的河

一起从头开始 发表于 2019-4-23 21:52
The pace at which technological innovations such as the internet have proliferated may seem unique t ...

我懂了！谢谢！

一起从头开始

The pace at which technological innovations such as the internet have proliferated may seem unique to the 21st century, but the industrial revolution provided an explosion of new technology that drastically changed life in analogous ways in the 18th century.

加粗的是主句.

‘at which technological innovations such as the internet have proliferated’ 修饰pace,