问题 选择题

近两年,国家质检局多次查出一些辣椒酱、番茄酱等含有工业染色剂“苏丹红一号”,人食用后可能致癌.“苏丹红一号”的化学式为C16H12N2O.下列对其说法中正确的是(  )

A.“苏丹红一号”属于混合物

B.“苏丹红一号”由30个原子构成

C.“苏丹红一号”的相对分子质量为248

D.“苏丹红一号”是有机高分子化合物

答案

A、混合物是指由多种物质组成的物质,根据“苏丹红一号”的化学式为C16H12N2O,该物质由C、H、N、O四种元素组成的化合物,故A不正确;

B、根据“苏丹红一号”的化学式为C16H12N2O,其分子由16个C原子、12个H原子、2个N原子、1个O原子共31个原子构成,故B不正确;

C、“苏丹红一号”C16H12N2O的相对分子质量=12×16+1×12+14×2+16=248,故C正确;

D、有机高分子化合物指相对分子质量达几万甚至几十万的含C元素的化合物,而“苏丹红一号”的相对分子质量为248,故D不正确;

故选C.

阅读理解

Treasure hunts have excited people’s imagination for hundreds of years both in real life and in books such as Robert Louis Stevenson’s Treasure Is-land. Kit Williams, a modern writer, had the idea of combining the real excitement of a treasure hunt with clues found in a book when he wrote a children’s story, Masquerade, in 1979. The book was about a hare, and a month before it came out Williams buried a gold hare in a park in Bedfordshire. The book contained a large number of clues to help readers find the hare, but Williams put in a lot of “red herrings”, or false clues, to mislead them.

Ken Roberts, the man who found the hare, had been looking for it for nearly two years. Although he had been searching in the wrong area most of the time, he found it by logic,not by luck. His success came from the fact that he had gaine4d an important clue at the start. He had realized that the words: “One of Six to Eight” under the first picture in the book connected the hare in some way to Katherine of Aragon, the first of Henry VIII’s six wives. Even here, however, Williams had succeeded in misleading him. Ken knew that Katherine of Aragon had died at Kimbolton in Cambridgeshire in 1536 and thought that Williams had buried the hare there. He had been digging there for over a year before a new idea occurred to him. He found out that Kit Williams had spent his childhood near Ampthill, in Bedfordshire, and thought that he must have buried the hare in a place he knew well, but he still could not see the connection with Katherine of Aragon, until one day he came across two stone crosses in Ampthill Park and learnt that they had been built in her honor in 1773.

Even then his search had not come to an end. It was only after he had spent several nights digging around the cross that he decided to write to Kit Williams to find out if he was wasting his time there. Williams encouraged him to continue, and on February 24th 1982, he found the treasure. It was worth 3000 in the beginning, but the excitement it had caused since its burial made it much more valuable.

小题1:Which of the following describes Roberts’ logic in searching for the hare?

A.Henry VIII’s six wives

B.Katherine’s burial place at Kimbolton

C.Williams’ childhood in Ampthill

D.Katherine of Argon小题2:What is the subject discussed in the text?

A.An exciting historical event.

B.A modern treasure hunt.

C.The attraction of Masquerade.

D.The importance of logical thinking.

问答题 简答题