PREP语法一道：wooden hull

Archaeologists in Egypt have excavated a 5000-year-old wooden hull that is the earliest surviving example of a "built" boat--in other words, a boat constructed out of planks fitted together--and that thus represents a major advance, in terms of boat-building technology, over the dugout logs and reed vessels of more ancient vintage.

a. together--and that thus represents

b. together--and this has represented

c.together, and it represents

d.together that was representing

e.together to represent

KEY:A

选A的话，句子结构就是Archaeologists have excavated a 5000-year-old wooden hull that is the earliest surviving example and that thus represents a major advance. 两个that平行，均修饰wooden hull。定语从句能够这样用吗？记忆中应该是不要第二个that的啊？

THX。

wooden hull that  is and that represents

句子应该是这个意思

谢谢回复。

同意你的意见。但是，为了使and前后的结构清晰，可以不省去第二个that吗？请问定语从句中有这种使用多个that的语法原则吗？请指出。

我觉得that不能省略会不会是因为that后面的v并不是一样的，如果省略了，句子结构反而会有问题了。

欢迎讨论！