题目

下列能作为苯分子中碳原子间的化学键是一种介于C-C键和C=C键之间的特殊的化学键的依据的是（） A . 经测定，邻二甲苯只有一种结构 B . 经测定，间二甲苯只有一种结构 C . 经测定，对二甲苯只有一种结构 D . 苯的一卤代物只有一种结构 答案：AAlan is an English boy. Now he studies in Shanghai Yucai Middle School. He is in Grade Seven. He has a dog. It’s black and white. The dog’s very clever. Alan likes it very much. Its favorite food is bone. Every day when Alan gets home, the dog meets him in front of the house.   Alan’s friend, Jenny is an American girl. She is in Shanghai, too. They are in the same grade, but in different classes. She has a pet panda. It’s also black and white, but it’s not a real panda. It’s a toy. The panda is very clean. Jenny often washes it in water. Where is the panda now? Oh, it’s sleeping with Jenny. Every night it sleeps with Jenny. 1. Where is Alan from? A. England         B. America        C. Canada 2.What’s Alan’s pet dog’s favorite food? A. Fish               B. Meat            C. Bone 3. What grade is Jenny in? A. Seven             B. Eight            C. Nine 4.What does the dog do when Alan gets home from school? A. It sleeps with him. B. It meets him in front of the house. C. It runs with him. 5.What animal is black and white according to the passage? A. Cat               B. Dog             C. panda and dog