问题
选择题
下列属于取代反应的是
A.苯与浓硝酸反应
B.乙烯生成聚乙烯
C.乙醇转化成乙醛
D.甲烷燃烧
答案
答案:A
有机物分子中的某些原子或原子团被其它原子或原子团所代替的反应是取代反应。A正确,B是加聚反应,C是氧化反应,D是燃烧,属于氧化还原反应。答案选A。
下列属于取代反应的是
A.苯与浓硝酸反应
B.乙烯生成聚乙烯
C.乙醇转化成乙醛
D.甲烷燃烧
答案:A
有机物分子中的某些原子或原子团被其它原子或原子团所代替的反应是取代反应。A正确,B是加聚反应,C是氧化反应,D是燃烧,属于氧化还原反应。答案选A。
用方框中所给单词或词组的适当形式填空。 | |
2. I don't think Sam can help you because he ___________ to the market. 3. Their classroom is too dark. So they have decided _________ to a brighter one. 4. __________ your clothes before you go out to play. 5. Do you enjoy __________ in Lanzhou? 6. I'll let ________ you _________ he go there, I think both of you are good. 7. He had _________ food________ water flor several days. Perhaps he was ill. 8. He _______ finish his work _________ eleven o'clock. 9. As soon as he _________ Guilin, he would call me. 10. he ________ very tired, doesn't he? |