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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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B，D fortunately 后面跟着的内容并没有呼应fortunately，有误。
E 把主句连接，就是：bombarded by neutrinos; fortunately, these particles are neutrinos that，明显neutrinos反复出现冗长且有错。
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