2016年春节期间，某市市场上菜价持续攀高，群众议论纷纷，让人想起了前几年政府叫得很响亮的“菜篮子工程”。蔬菜是老百姓生活的必需品，保障老百姓有菜吃、有好菜吃、吃得起菜，是各级、各地政府的重要职责。蔬菜供应量不足时，各地政府曾下大力气抓“菜篮子工程”。如今农民种菜多了，市场供应不用发愁了，说明“菜篮子工程”确实抓出了实效。但是，如果就此以为“菜篮子工程”完成了，把菜价完全交给市场去自发调节，而不管农民种的菜能不能顺利装进城市消费者的“菜篮子”，政府的工作就是虎头蛇尾、半途而废。

    There are many theme parks in Florida. These amusement parks are designed for kids big and small and have plenty to offer adults, too.

    Magic Kingdom

    Orlando is the center of theme parks in Florida. Of all the parks, no trip to Orlando would be complete without a visit to Magic Kingdom. The center of Disney world, with Main Street USA and Cinderella's Castle, is here at Magic Kingdom. There are rides for kids of all ages as well as shopping and dining.

    Epcot

    After Magic Kingdom, the best-known theme park in Disney World is Epcot. This is a good place for curious kids who want to learn about the planets, the stars, and the workings of the human body. The good and wine festival is another big draw to Epcot.

    Animal kingdom

    When it comes to the top 4 Florida theme parks, Animal kingdom must be on the list. You may have had the chance to go to a zoo before, but Animal kingdom brings the concept of a zoo to new heights. Sure you can go on the safari (狩猎旅行), but there are also rides on different animals, even dinosaurs.

    Universal's Island of Adventure

    If your kids have the need for speed, you will surely want to check out Universal's Island of Adventure. Here roller coasters and thrill rides will combine the magic of the movies with plenty of twists (旋转) and turns. You'll also find Wizarding World of Harry Potter here---something the whole family is sure to enjoy.

下列物品所使用的主要材料属于有机合成材料的是（　　）

在下面的方格中，每行、每列都有1～4这四个数，并且每个数在每行、每列都只出现一次。A应该是几?B呢?