Which of the following is true according to the passage?

A．Radioactive chemicals can cause bodily cells to grow wildly out of control.

B．When the danger of radiation had not been proved, high doses of radiation were acceptable.

C．Most cancers are caused by radiation.

D．Radioactive chemicals were once used to cure diseases with the digestive system.

查看答案及解析进入在线模考

参考答案

答案解析

【定位】第一段第二、三句“At school，you had been fed cereal laced with radioactive chemicals so scientists could learn more about the digestive system．Because the food was radioactive，scientists could easily trace its path through the body．”。
【答案详解】本题为细节题。由定位句可知，在学校，你一直食用含有放射性化学物质的谷类食物，这样科学家可以了解消化系统的情况。因为食物是放射性的，科学家能很容易通过身体追踪到它的路径。也就是说放射性物质过去用于治疗消化系统相关疾病。故选D。

你可能感兴趣的试题

1 Today, government rules __________.

A．demand to stop all experiments harmful to people

B．prohibit all tests related to human beings

C．disapprove of experiments with uncertain results

D．require to protect people' s right not to be tested without permission

查看解析在线模考

2 The author' s attitude towards the government decision may he described as __________.

A．indifferent

B．favorable

C．critical

D．Dubious

查看解析在线模考

3 __________ five hundred people are believed to have drowned.

A．As many as

B．As much as

C．So many as

D．So much as

查看解析在线模考