7. The passage mentions which of the following as a reason that neutrinos are hard to detect？
（A） Their pervasiveness in the universe
（B） Their ability to escape from different regions of space
（C） Their inability to penetrate dense matter
（D） The similarity of their structure to that of nucleons
（E） The infrequency of their interaction with other matter
8. According to the passage， the interaction of a neutrino with other matter can produce
（A） particles that are neutral and massive
（B） a form of radiation that permeates the universe
（C） inaccurate information about the site and circumstances of the neutrino’s production
（D） charged particles and light
（E） a situation in which light and other forms of electromagnetic radiation are blocked
9. According to the passage， one of the methods used to establish the properties of neutrinos was
（A） detection of photons
（B） observation of the interaction of neutrinos with gamma rays
（C） observation of neutrinos that were artificially created
（D） measurement of neutrinos that interacted with particles of seawater
（E） experiments with electromagnetic radiation
參考答案：ACAD EAEDC
（A） Their pervasiveness in the universe
（B） Their ability to escape from different regions of space
（C） Their inability to penetrate dense matter
（D） The similarity of their structure to that of nucleons
（E） The infrequency of their interaction with other matter
8. According to the passage， the interaction of a neutrino with other matter can produce
（A） particles that are neutral and massive
（B） a form of radiation that permeates the universe
（C） inaccurate information about the site and circumstances of the neutrino’s production
（D） charged particles and light
（E） a situation in which light and other forms of electromagnetic radiation are blocked
9. According to the passage， one of the methods used to establish the properties of neutrinos was
（A） detection of photons
（B） observation of the interaction of neutrinos with gamma rays
（C） observation of neutrinos that were artificially created
（D） measurement of neutrinos that interacted with particles of seawater
（E） experiments with electromagnetic radiation
參考答案：ACAD EAEDC