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
2024-02-07
35
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、He may feel fine.
B、He may die of cancer.
C、He may bring harm to his descendants.
D、All of the above.
答案
D
解析
事实细节题。通读全文,我们可知当一个人受到放射线的危害时,他可能感觉还好,由于病原潜伏在他体内,所以可能五年或二十年后才病发患癌死去,或者影响自己的后代,给他们造成伤害。选项A,B,C都各指出了一个方面,故选项D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3429014.html
相关试题推荐
[originaltext]Americanshaveneverhadnationaleducationstandards.(32)Goa
[originaltext]UnrestinNorthAfricaandtheMiddleEasthaspushedoilpri
[originaltext]UnrestinNorthAfricaandtheMiddleEasthaspushedoilpri
[originaltext]UnrestinNorthAfricaandtheMiddleEasthaspushedoilpri
[originaltext]Todaywerememberamanwhowasconsideredoneofthebestte
[originaltext]Todaywerememberamanwhowasconsideredoneofthebestte
[originaltext]Todaywerememberamanwhowasconsideredoneofthebestte
[originaltext]W:Hello!Canyouintroduceyourselfplease?M:Sure,mynameis
[originaltext]W:Hello!Canyouintroduceyourselfplease?M:Sure,mynameis
[originaltext]W:Hi,Michael,youdon’tlooksogood.Anythingwrong?M:I’mO
随机试题
Oneofthefirstthingsthatshouldstrikeanyhalfobservantparentisthe
[originaltext]M:Wehavetime,don’twe?EverytimeweVegoneonatrip,we’ve
管片堆场要平整,道路要通畅就可以了。()
杜氏利什曼原虫的前鞭毛体寄生于A.中华白蛉胃内 B.人体红细胞内 C.人体肝
可引起深反射亢进的疾病是( )。A.末稍神经炎 B.神经根炎 C.脊髓灰质
滑石粉煨肉豆蔻时,每100kg肉豆蔻用滑石粉A.20kg B.30kg C.
下面哪一项不属于BAS作用的特点A.生物素、亲和素间结合具高度专一性和亲和力B.
把下列的六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是
勘察设计招标文件内容不包括()A.评标办法 B.投标人须知 C.合同条款及
2016年4月18日,甲市B区某生产经营单位发生了安全生产事故,造成29人死亡,
最新回复
(
0
)