请教PREP第一套的139题

fight2015

天蝎座1107 发表于 2009-7-30 23:40
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow ...

B 为什么没有完整的主谓宾呢？换成正常语序的话the rate of tree growth are  among the surest indications of sunspot cycles.
还有后面的as seen的as是干什么的呀？

醒醒Shine

天蝎座1107 发表于 2009-7-30 23:40
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow ...

总算明白了，原来是倒装。。。。谢谢

cynthia112

天蝎座1107 发表于 2009-7-30 23:40
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow ...

同意！