首页
登录
职称英语
[originaltext] Nuclear radiation has a certain mystery about it, partly beca
[originaltext] Nuclear radiation has a certain mystery about it, partly beca
游客
2023-07-06
45
管理
问题
Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’ t be seen or heard, or touched, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we cannot detect them, sense them, without a radio receiver. Similarly, we can’ t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is harmful to human beings and other living things.
At very high levels, radiation can kill an animal or human being outright by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be irradiated and feel fine, then die of cancer five or twenty years later as a result. Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.
Radiation can hurt us. We must know the truth.
Questions 22 to 25 are based on the passage you have just heard.
22. Why is nuclear radiation mysterious?
23. How can high levels of radiation kill an animal or human being?
24. Which of the following cases is the most dangerous?
25. What will happen if a person is irradiated?
选项
A、By killing all the cells.
B、By killing the vital organs.
C、By killing the vital cells.
D、By killing masses of cells in vital organs.
答案
D
解析
细节辨认题。短文中第二段第一句指出At very high levels,radiation can kill an animal or human beingoutright by killing masses of cells in vital organs.由此可知高强度的辐射通过杀死要害器官的大量细胞可以直接造成动物或人类的死亡。故选项D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2812746.html
相关试题推荐
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
[originaltext]AnewstudyprovestheoldRomansaying,"Asoundmindinas
[originaltext]M:Ihaveareservationfortonight,andIjustwanttocheckin.
[originaltext]M:Ihaveareservationfortonight,andIjustwanttocheckin.
[originaltext]W:Dave,canwetalkforaminute?I’mgettingreallyconcerneda
[originaltext]M:Linda,whydoyouneedmynotes?IrememberseeingyouinProf
[originaltext]M:Linda,whydoyouneedmynotes?IrememberseeingyouinProf
[originaltext]M:Linda,whydoyouneedmynotes?IrememberseeingyouinProf
[originaltext]M:Linda,whydoyouneedmynotes?IrememberseeingyouinProf
[originaltext]M:Linda,whydoyouneedmynotes?IrememberseeingyouinProf
随机试题
Weshouldlearntoavoid(make)______thesamemistakeagain.making我们应该学着避免再犯同样
TakingEarlyRetirementMayRetireMemory,TooThetwoeconomi
OnPublicSpeakingWhenpeopleareaskedtogiveaspeechinpu
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondta
信息系统工程的进度控制需要进行多方面的控制,需要考虑的因素有很多。通常情况下可以
下列关于化学常识的表述中,正确的是:A.酸雨是大气污染的一种,它的主要成因是大量
A.4% B.10% C.15% D.30% E.50%~75%老年人液
2020年7月1日,企业借入2年期的借款2000万元用于建造固定资产,年利率为
下列除哪项外,均是低分化乳腺癌的病理类型()A.硬癌 B.髓样癌
作为高中美术教师至少应该具备开设( )个模块的课程的能力。A.1个 B.2个
最新回复
(
0
)