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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
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(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.
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