题目

In ancient Japan, if you saved someone’s life, they would make it their duty to spend the rest of their life serving you. Nowadays, if you rescue someone’s story, he or she will feel the same kind of gratitude(感激). It happens all the time. Someone in a group is telling a story and, just before their big point, BOOM! There’s an interruption. Someone new joins the group, a waiter with a plate of biscuits comes over, or a baby starts crying. Suddenly everyone’s attention turns to the new arrival, the food on the plate, or the “charming” little child. Nobody is aware of the interru(1)分子式为C8H10的芳香烃同分异构体的结构简式有_____种。(2)苯环上的一个氢原子被氯原子取代后生成的同分异构体数目最少的是_____（填结构简式，下同），该一氯代物的结构简式是_____(3)_____的一氯代物种类最多。