现在分词前有逗号的情况，请教

chaojizongzi · 发表于 2010-6-12 10:00:09

The discovery that Earth’s inner core rotates independently of and more quickly than Earth’s outer layers is responsible for advancing studies of the flow of heat from the inner through the outer planet and of the formation and periodic reversal in direction of Earth’s magnetic field.
A.   core rotates independently of and more quickly than Earth’s outer layers is responsible for advancing studies of the flow of heat from the inner through the outer planet and of the formation and periodic reversal in direction of Earth’s magnetic field 平行
B.   core rotates independently of and more quickly than Earth’s outer layers is responsible for advancing studies of how heat from the inner core flows through the outer planet, and the formation and periodic reversal in direction of Earth’s magnetic field
C.   core rotates independently and more quickly than Earth’s outer layers are responsible for advancing studies of how heat from the inner core flows through the outer planet, and how Earth’s magnetic field forms and the periodic reversal of its direction
D.   core, rotating independently and more quickly than Earth’s outer layers, are responsible for advancing studies of the flow of heat from the inner through the outer planet, and the formation and periodic reversal in direction of Earth’s magnetic field
E.   core, rotating independently of and more quickly than Earth’s outer layers, is responsible for advancing studies of the flow of heat from the inner through the outer planet and of how Earth’s magnetic field forms and the periodic reversal of its direction

E中的core, rotating independently of and more quickly than Earth’s outer layers， rotating independently在这里会不会有歧义修饰主语？

现在分词做后置定语的时候前面可以有逗号吗？

chaojizongzi · 发表于 2010-6-12 10:16:48

现在分词做定语时，既可以做限制性修饰成分修饰先行词，又可以做非限制性成分修饰先行词吗？？？？

现在分词前有逗号的情况，请教

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