题目

第三部分  阅读理解（共20小题；每小题2分，满分40分）      阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。 A Some people have unforgettable past memories that make them sad and angry. Well, to deal with this, I suggest that you pick yourself up and move ahead. It is easier said than done! So here are a few ways to bring about the change. Do something you really love doing. We all have interest in what we love working on, but most of us don’t have any time to do anything about them. 有机化合物键线式的特点是以表示键，每个拐点和端点均有表示一个碳原子，并以氢原子补足四价，C、H不表示出来，某有机化合物的立体结构如图所示．（1）写出该有机化合物的分子式 ；（2）当该有机化合物发生一氯取代时，能生成 种同分异构体；（3）该有机化合物属于 ．