2018届高考英语二轮复习阅读理解主旨大意题专练三段落大意类

ce radiation.РC.Features of radiation from cellphones.РD.Differences between ionizing and non­ionizing radiation.Р解析:C 考查主旨要义。根据第三段的内容尤其是“non­ionizing radiation does not deposit enough energy into cells to release electrons from atoms or in molecules, producing ions. So it tends to be far less harmful than ionizing radiation...”可知,本段主要讲的是手机辐射的特点,它是非电离的,其危害性远低于电离辐射。Р12.What might be the theme of NTP scientists' further research?РA.Why cellphone use causes cancer.РB.Whether cellphone use really causes cancer.РC.What health effects cellphone use has.РD.How much exposure to cellphone radiation is safe.Р解析:B 考查推理判断。根据最后一段中的“It said only that phone use might ‘possibly’ cause cancer. So scientists at the National Toxicology Program, or NTP, investigated further”可知,NTP的科学家进一步研究的主题可能是手机使用是否真的会导致癌症。