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标题: 求助og11紫皮第1题 [打印本页]

作者: llindar    时间: 2008-10-28 07:08     标题: 求助og11紫皮第1题

1、some bat caves,like honeybee hives, have residents that take on different duties such as defending the entrance, (acting as sentinels and to sound) a warning at the approach of danger, and scouting outsides the cave for new food and roosting sites.

划线见括号内

B.acting as sentinels and sounding

请问大家正确答案B中的sounding 是和哪个平行的?如果是B 那么句中就有2个and,这与平行结构只有最后一个用and不是矛盾吗?谢谢!
作者: karen_gao    时间: 2008-10-28 18:55

sounding a warning 是和前面acting as sentinels 平行的,同时acting as sentinels and sounding a warning at the approach of danger仅代表different duties 中的一个,并和前面的defending the entrance以及后面的scouting outsides the cave for new food and roosting sites平行。。。类似这样的结构在GMAT中还有很多,即大平行结构中包含小平行结构。
作者: 诡异儿    时间: 2008-10-28 20:41

acting as sentinels and sounding 是一个局部并列,该局部并列同整个句子构

成大并列


作者: mandyuuqq    时间: 2008-10-29 06:55

对,同意楼上看法,注意后面那个and前的","是不能省的.
作者: lixinli    时间: 2008-11-1 06:56

and sounding 前面没有,




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