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题库 / Prep2007E1-SC-42
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.
neutrinos are harmless elementary particles that are produced in nuclear reactions and that
neutrinos, which are harmless, are elementary particles produced in nuclear reactions and which
neutrinos are harmless elementary particles produced in nuclear reactions and which
these harmless elementary particles are produced in nuclear reactions, and neutrinos
these elementary particles, harmless products of nuclear reactions, are neutrinos that
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
(A) 正确, 正确的使用了neutrinos are …. particles that… and that…结构,表达清晰
(B) 句子结构复杂;and which…定语从句没有并列对象，不能与前面which引导的插入语并列。
(C) and which…没有并列对象。
(D) these在这里没有明确指代; and后面的句子与前面不连贯。
(E) these没有明确指代;that限定性定语从句从语法上应该修饰紧临的名词neutrinos,而逻辑上应该修
饰particles,不符合原句意思.实际上所有的neutrinos interact very weakly with matter, 否则neutrinos
就不是harmless.——判断方法：是否所有的neutrinos都符合限定性定语从句，符合！那么就不能修饰；是否所有的particles都符合限定性定语从句，不符合！那么久可以修饰
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