题目

下列烷烃中可能存在同分异构体的是                       A．甲烷     B．乙烷     C．丙烷     D．丁 答案：D此题要求改正所给短文中的错误。对标有题号的每一行做出判断：如无错误，在该行右边横线上画一个勾(√)；如有错误(每行只有一个错误)，则按下列情况改正：此行多一个词：把多余的词用斜线(\)划掉，在该行右边横线上写出该词，并也用斜线划掉。此行缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。注意：原行没有错的不要改。Dear Ms Smith, I’m Li Hua from the Student Union of Yucai Middle School.     【小题1】..___________We were organizing an art exhibition for high school students      【小题2】. ___________in our city. It will be hold on the 9th of June in the Exhibition       【小题3】. ___________Hall of Beihai. More than 1,000 painting will be on show,          【小题4】.. ___________but high school students and teachers from all the five districts      【小题5】. ___________will come to the event. As you are very popularly with us        【小题6】.. ___________Chinese high school students, we’d like to invite for you          【小题7】. ___________to the exhibition. We would be grateful when you could           【小题8】. ___________join them that day.                                          【小题9】.. ___________ I am looking forward hearing from you soon.                 【小题10】. ___________                                  Yours, Li Hua