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On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

正确答案: E

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发表于 2009-11-25 11:28:08 | 只看该作者 回帖奖励 |正序浏览 |阅读模式
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.



A.   On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow

B.    On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth

C.   On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles

D.   Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate

E.    Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow

Answer: C请问后面一句as seen in the rings visible in the cross sections of their trunks 是什么意思啊?As又是什么用法啊?





as seen in the rings visible in the cross sections of their trunks 是什么意思啊?As又是什么用法啊?


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 楼主| 发表于 2009-11-25 19:32:26 | 只看该作者
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