完形填空

　The Browns are  1  Smiths' neighbours. Mr. Brown's name is John. But when his neighbours talk about him, they  2  him. “Mr. Going-to-do”. Do you know why? Mr. Brown always says he is going to do something, but he  3  does it. Every Saturday Mr. Brown  4 to the Smiths' back door and talks to Mr. Smith. He always says he  5  do something.“I'm going to clean my house today, ”he says,   6  “I'm going to wash my car tomorrow, ”or “These trees in front of my house are  7  big. I’m going to cut them down next week. ”Mr. Smith usually says, “Are you going to do, John? ”He knows his neighbour is 8  going to clean his house, or wash his car, or cut down any trees. Then he says, “Well,   9  me, John. I’m going to do some work in the house. ”And he does. Mr. and Mrs. Smith often say to their only child Dick, “Are you going to do something? Then do it. Don't be  10  ‘Mr. Going-to-do’. ”

下列著作和作者搭配正确的是(    )

①《本草纲目》——李时珍     ②《天工开物》——宋应星

③《三国演义》——罗贯中     ④《水浒传》——施耐庵

⑤《红楼梦》——董其昌      ⑥《西游记》——吴承恩

据有关媒体报道，受前期多雨、高温等气候影响，今年大闸蟹在全国范围内产量出现了下降。尤其是高品质、大规格的大蟹，其养殖时间长、成本高、数量少，出现了“一蟹难求”的局面。高昂的价格，让消费者望而却步，“不吃螃蟹改吃鱼虾了”；而螃蟹养殖户小王由于科学养殖、合理安排螃蟹上市时间，赚得盆满钵满，他说：“明年我还要扩大规模”；一家螃蟹深加工企业老板说：“我们得多考虑成本，今年日子难过呀”！

结合材料，运用价格的相关知识，分析螃蟹价格的变化对人们的生活与生产会产生哪些影响?

松节油在浓硫酸、加热条件下反应消去反应，最多可有几种有机产物
（不考虑立体异构）