题目

This year our school is _______than it was last year.   A. much more beautiful                        B. much beautiful    C. the most beautiful                            D. beautiful 答案：A  much修饰形容词和副词的比较级, beautiful的比较级是more beautiful。工业上可由乙苯生产苯乙烯：，下列说法正确的是（ ）A. 该反应的类型为消去反应B. 乙苯的同分异构体共有三种C. 可用Br2/CCl4鉴别乙苯和苯乙烯D. 乙苯和苯乙烯分子内共平面的碳原子数均为7