Question

阅读理解 　　Radioactivity is dangerous．It may cause skin burns, it may destory good tissues(组织)and it may cause illness that could be passed on to our children and grandchildren．In case of exposure(暴露)it may even cause death． 　　In the early days of radioactivity, scientists did not realize these dangers．Marie and Pierre Curie, after having worked for a while with radioactive materials, noticed that their fingers were reddened and swollen(红肿)and the skin was peeling off．Henry Becquerel carried a small tube with radium in it in his waistcoat pocket, and was surprised to find a burn on his chest．Other early workers also reported burns and harm of different kinds． 　　The strange fact is that it can harm without causing pain, which is the warning signal we expect from harmfulness．Pain makes up pull back our hands from a fire or a hot object, but a person carrying radioactive materials had no way of telling whether he is touching something too“hot”for safety．Besides, the“burns”or other harmfulness that radioactivity produces may not appear for weeks．A person may have been hurt without knowing it for some time． (1) Which is the topic sentence for this passage? [　　] A． Radioactivity may ever cause death． B． Radioactivity does great harm to children． C． Radioactivity may do harm to people without being known． D． Radioactivity is dangerous． (2) A few people were mentioned in the passage．They ________． [　　] A． were all famous scientists of great achievements B． died of radioactivity C． knew little about radioactivity D． did experiments on themselves to find the danger of radioactivity (3) According to the point of the passage, pain ________． [　　] A． causes people to die B． brings people suffering C． is an important signal D． is very much expected (4) The sentence in the third line of the second paragraph“the skin was peeling off”means“________”． [　　] A． the skin was coming off B． the skin was turning off C． the skin was breaking away D． the skin was fleeing

Answer 1

答案：1．D;2．A;3．C;4．A;
解析：

(1)	通读全文后，得知文章主要讲的是放射现象的危险性．再将选项进行比较，即可推断出答案．
(2)	文章所提到的人物皆为著名的科学家．
(4)	peel的汉语意思是“剥下”．