标题: 一个语法笔记的问题(sc 67题) [打印本页] 作者: riveryang114 时间: 2011-12-21 04:45 标题: 一个语法笔记的问题(sc 67题) 65 Developed by Pennsylvania's Palatine Germans about 1750, Conestoga wagons had high wheels capable of crossing rutted roads, muddy flats, and the nonroads of the prairie, and a floor that was curved upward at both ends to prevent cargo from shifting on steep grades.
以上已经是正确答案。根据我看语法笔记的解释,最后一个and a floor....是和前面的Conestoga wagons had..并列,但是既然两者并列,那么最后一个and前面不应该有逗号了,如果有逗号,and后面应该重复前面的主语(或者用it )。。。。我不明白我是哪里想错了。。。