首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Because it cannot be noticed by human senses. B、Because sometimes it can be detected by human sense. C、Because it may be all a
A、Because it cannot be noticed by human senses. B、Because sometimes it can be detected by human sense. C、Because it may be all a
admin
2014-11-27
27
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、Because it cannot be noticed by human senses.
B、Because sometimes it can be detected by human sense.
C、Because it may be all around us.
D、Because it may be touched sometimes.
答案
A
解析
信息明示题。短文开头就提到Nuclear radiation has a certain mystery about it,partly because it cannot bedetected by human senses.故可知核辐射的神秘之处在于人类感觉不到它。所以选项A正确。
转载请注明原文地址:https://kaotiyun.com/show/S4v7777K
0
大学英语四级
相关试题推荐
A、Becauseelectricvehiclesaremorepopular.B、Becausemoreandmorepeoplewanttobuyacar.C、Becausemanycountrieshavebe
A、It’sarelativelysmalltown.B、Thepeoplelivingthereareveryrich.C、Ithasaterriblepopulation.D、It’sclosetoLondon.
______(我们已经习惯了金钱就是成功的观念)thattheverythoughtofquittingapromisingcareerseemsfoolish.
A、TheBritish.B、TheAmericans.C、TheRomans.D、TheRussians.C选项表明,本题考查某个国家的人,听音时注意留意不同国籍的人的相关情况,并听清问题问的是什么。短文中提到,罗马人首先使用记载式广告,
A、Eatingmorevegetables.B、Eatinglesssweetfood.C、Eatingfoodinlowfat.D、Eatingnutritiousfoods.B题干询问保持饮食均衡最重要的是什么。对话中,
Thegreatship,Titanic,sailedforNewYorkfromSouthamptononApril10th,1912.Shewascarrying1,316【C1】______andcrewof8
A、Tomakethewomanangry.B、Topleasetheman’smother.C、Davidistheman’sgoodfriend.D、Davidisgoodatcarryingonconver
Thegreatship,Titanic,sailedforNewYorkfromSouthamptononApril10th,1912.Shewascarrying1,316【C1】______andcrewof8
随机试题
关于依赖综合征,错误的说法是
实际能力已达不到《等级证书》能力等级的检测机构,质监机构应当给予注销《等级证书》的处分。()
软包材料应有()
甲房地产开发公司(以下简称甲公司)经过市场调研发现,某经济技术开发区范围内的别墅供应量充足,而该开发区范围内的外籍人士十分渴望拥有欧式建筑风格的住宅。甲公司精心推出了80套欧式建筑风格的别墅来满足外籍人士住宅需求的目标市场模式是()。
下面选项中,说法正确的是()。
交易所根据市场风险情况,持仓情况,合约到期情况调整保证金比例。目前国内交易所的保证金水平为()
基金运营事务是基金投资管理与市场营销工作的后台保障,它通常包括()。
林某不服乙市甲县环保局的处罚决定提起行政诉讼,甲县法院既不立案,也未作出不予立案的裁定,林某遂向乙市中级法院起诉,乙市中级法院经审理认为其符合行政诉讼起诉条件,乙市中级法院()。
某市有甲、乙、丙、丁四家书店,其中甲书店的各种图书都能在乙书店中找到,在乙书店出售的图书,一定也在丙书店出售,而丙书店有一些图书在丁书店中也有销售。由此可以推出()。
法国生命哲学家柏格森十分强调运动变化,以至他的哲学被称为“变的哲学”。在柏格森看来,“事物和状态不过是我们的心灵所采取的一种观点,事物是不存在的,存在的只有动作。”这句话的错误在于否认了
最新回复
(
0
)