过抛物线y²=2px（p＞0）的焦点F的直线l，与该抛物线及其准线从上向下依次交于A，B，C三点，若|BC|=3|BF|，且|AF|=3，则该抛物线的标准方程是（   ）

阅读短文，从方框中选择单词，根据实际情况用适当的形式，使短文意思完整、通顺。每空一词，每词只能用一次。

swim,  four,  snow,  after,  weather

    We know that there are ____ seasons（季节）in a year: spring, summer, autumn and winter. In spring, the ____ is warm. Everything grows fast. It is a good season for hiking (远足). Summer comes ____ spring. It is usually hot in summer. The children like to go ____. They are very happy in the cool water. It often rains and sometimes it rains heavily. In autumn, it is cool. The farmers are busy. It is often cold in winter. Sometimes it ____, and all the houses, trees and other things become white. The world is so beautiful in this season and people are very happy!

下列各句中意思明确，没有语病的一句是 （　　）

家用炒菜铁锅用水清洗放置后，出现红棕色的锈斑，在此变化过程中不发生的化学反应是

阅读下文，回答相关问题。

         苏城有南园、北园二处，菜花黄时，苦无酒家小饮。携盒而往，对花而饮，殊无意味。或议就近觅饮者，或议看花归饮者，终不如对花热饮为快……街头有鲍姓者，卖馄饨为业，以百钱雇其担，约以明日午后。鲍欣然允议。明日看花者至，余告以故，众咸叹服。饭后同往，并带席垫，至南园，择柳阴下团坐。先烹茗，饮毕，然后暖酒烹肴。是时风和日丽，遍地黄金，青衫红袖，越阡度陌，蝶蜂乱飞，令人不饮自醉。既而酒肴俱熟，坐地大嚼。担者颇不俗，拉与同饮。游人见之，莫不羡为奇想。杯盘狼藉，各已陶然，或坐或卧，或歌或啸。红日将颓余思粥担者即为买米煮之果腹而归。（节选自《浮生六记·闲情记趣》）