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
答案选E，谁能解释一下E这句话是怎么看的。是不是有倒装在里面，那面正确的句子结构是什么？Among the surest indications on Earth of sunspot cycles是一个整体还是Among the surest/ indications on Earth of sunspot cycles？
此外，as seen in the rings visible in the cross sections of their trunks，这句话的逻辑主语是谁啊？ 作者: eeheaven 时间: 2011-8-4 20:21
倒装我觉得，个人理解是这样的
flip it! : E: the rate (at which) trees grow is believed to be among the surest indications (on Earth) of sunspot cycles, as seen in the rings visible in the cross sections of their trunks.
中文：树木成长的速率（可以通过观察树干的某个东西发现）被认为是世上最准确的太阳黑子活动周期指标。
为了凸显C与E的区别，也就是their的指代，我将as提前：
The rate at which treesgrow, as seen in the rings visible in the cross sections oftheir
trucks, is believed to be among the surest indications on Earth of sunspot cycles. 作者: supermanlee 时间: 2011-8-5 06:28
倒装我觉得，个人理解是这样的
flip it! : E: the rate (at which) trees grow is believed to be among the surest indications (on Earth) of sunspot cycles, as seen in the rings visible in the cross sections of their trunks.
中文：树木成长的速率（可以通过观察树干的某个东西发现）被认为是世上最准确的太阳黑子活动周期指标。
这不就是C选项么～作者: steinlala 时间: 2011-8-5 21:24
倒装我觉得，个人理解是这样的
flip it! : E: the rate (at which) trees grow is believed to be among the surest indications (on Earth) of sunspot cycles, as seen in the rings visible in the cross sections of their trunks.
中文：树木成长的速率（可以通过观察树干的某个东西发现）被认为是世上最准确的太阳黑子活动周期指标。
介词短语换位置修饰对象不同
C里面on earth修饰的是rate
E里面 surest indications on Earth 修饰的是indication
我说的“世上”的修饰对象是“指标”不是“速率”
另外C是错误的：
C.On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles, as seen in the rings visible in the cross sections of their trunks.
正确语序应该把as后面的东西提前The rate at which treesgrow, as seen in the rings visible in the cross sections oftheir trucks, is believed to be among the surest indications on Earth of sunspot cycles.
因为没有这样的选项，所以gmac才倒装：
E.Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow, as seen in the rings visible in the cross sections of their trunks.
为了让their就近修饰trees
这样理解总不会有误了吧？
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