求助！prep07-1-42题代词指代问题

hupan · 发表于 2013-11-26 20:11:11

As a result of a supernova explosion, every human being on Earth was bombarded on February 23,
1987, by about 100 billion neutrinos; fortunately, neutrinos are harmless elementary particles that
are produced in nuclear reactions and that interact very weakly with matter.

(A) neutrinos are harmless elementary particles that are produced in nuclear reactions and that
(B) neutrinos, which are harmless, are elementary particles produced in nuclear reactions and
which
(C) neutrinos are harmless elementary particles produced in nuclear reactions and which
(D) these harmless elementary particles are produced in nuclear reactions, and neutrinos
(E) these elementary particles, harmless products of nuclear reactions, are neutrinos that

笔记上说DE的these没有指代对象，是不是these这些词只能指代前面同一句话中出现过的名词？这里的这个these因为一个分号隔开所以就不能指示前面的neutrinos？

还有在prep07-1中的29题
Oaks preferring drier ones, pine trees thrive in relatively wet climates.

(A) Oaks preferring drier ones, pine trees thrive in relatively wet climates.
(B) With oaks preferring drier ones, pine trees thrive in relatively wet climates.
(C) Whereas oaks prefer drier ones, with pine trees thriving in relatively wet climates.
(D) Pine trees thrive in relatively wet climates, whereas oaks prefer drier ones.
(E) Pine trees thriving in climates that are relatively wet ones, oaks prefer drier climates.

A中的ones是不是只能指代前面前面的名词，而不能指代后面的climates?

谢谢大神解答啊

本贴相关题目 GMATPrep-2007E1-SC-29 (RBOQ)

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求助！prep07-1-42题 代词指代问题

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求助！prep07-1-42题代词指代问题