Susan is looking ___ the window. She is looking ___ a tree.  （  ）

    The Dragon Boat Festival is an interesting Chinese festival. Usually, it's in May or June. People all like it very much.

    They usually have dragon boat races. Dragon boats are very long. They look like dragons. In every boat, there are many people rowing boats. Dragon boat races are very interesting for Chinese people.

    At the Dragon Boat Festival, people also eat zongzi. People usually use rice, meat(肉), vegetables and other things to make zongzi. There are many kinds of zongzi. They are all nice, and people usually give them to their friends.

    The Dragon Boat Festival is a great time for people.

根据短文内容，回答下列问题。

代诗歌阅读。阅读下面这首宋词，完成下题。

青玉案

曹组

                                       碧山锦树明秋霁。路转陡、疑无地。忽有人家临曲水。竹篱茅舍，酒旗沙岸，一簇成村市。

                                       凄凉只恐乡心起。凤楼远、回头谩①凝睇。何处今宵孤馆里，一声征雁，半窗残月，总是离人泪。

【注】①谩：徒然、空自。

已知A、B、C、D、E是不同类别的物质，C俗称纯碱，F是人体中含量最多的物质（部分反应物、生成物及反应条件已略去）．

下列关于A﹣F的说法错误的是（   ）