问题 选择题

合成新物质是研究化学的主要目的之一.意大利科学家最近合成了一种新型的氧分子O4.下列关于O4的说法中,正确的是(  )

A.O4是一种新型的化合物

B.1个O4分子由两个O2分子构成

C.等质量的O4和O2含氧原子数目相同

D.O4和O2可通过氧化还原反应实现转化

答案

A、化合物至少含有两种元素,故A错误;

B、分子中不可能含有分子,只能含有原子,故B错误;

C、依据氧元素守恒分析,都是氧元素组成,等质量为重氧元素质量相同,氧原子数相同;故C正确;

D、同种元素形成的不同单质是同素异形体,因此O4与O3是同素异形体,O4和O2可实现转化,但不是氧化还原反应,故D错误;

故选C

阅读理解

Mr. Jones works in a factory far away from his home. One day he wanted to send a letter to his wife, but he could neither read nor write, and he had to work all day, so he could only look for somebody to write his letter late at night. At last he found the house of a letter-writer whose name was Nasreddin. 

Nasreddin was already in bed. “It is late,” he said. “What do you want?” “I want you to write a letter to my wife,” said Mr. Jones. Nasreddin was not pleased. He thought for a few seconds and then asked, “Has the letter got to go far?”

“What does that matter?” answered Mr. Jones. 

“Well, my writing is so strange that only I can read it, and if I have to travel a long way to read your letter to your wife, it will cost you a lot of money. ”Mr. Jones went away with no words.

小题1:Mr. Jones is a ________.

A. letter-writer                    B. postman                  C. worker

小题2:Mr. Jones looked for somebody to write a letter for him ______.

A. late at night

B. in the morning

C. in the afternoon

小题3:Nasreddin was not pleased because he wanted to ______.

A. write the letter             B. make money               C. remain in bed

小题4:We know from the story that Nasreddin is a _______ man.

A. kind                     B. funny                        C. strict

小题5:Which of the following statements is TRUE?

A. Mr. Jones paid no money to Nasreddin.

B. Mr. Jones was happy when he heard the words.

C. Nasreddin wrote the letter for Mr. Jones.

判断题