题库 / Prep2007E1-SC-90
Archaeologists in Egypt have excavated a 5,000-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.为什么这里会被遮住？
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together--and that thus represents
together--and this has represented
together, and it represents
together that was representing
together to represent
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并列结构
this it指代不清
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