计算下面图形的面积。(单位：cm)

根据短文内容，选择正确答案。

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    Mr. White works in an office. He liked reading in bed when he was at school. It was bad for his eyes and now he is near-sighted. But he wouldn't want anybody else to know about it and he never wears a pair of glasses. It often brings him some trouble.

    One winter morning he was sent to a village school on business. He got off a bus at a stop in a small town. Then he had to walk there. The road to the village wasn't smooth. There were stones here and there. He fell over several times and it made his clothes very dirty. At last he got to the village. Suddenly it began to blow strongly and it got much colder. His hat was blown off while he was looking for the school. He had to run after it but he couldn't catch it. He was wondering why his hat ran into a house as if it had legs. And then he ran into the house, too.

    A big woman appeared and stopped him by shouting angrily, "What are you running after my hen for?"

读相关材料，回答下列问题。

材料一　博斯腾湖是我国最大的内陆淡水湖，该地年降水量不足30毫米，蒸发量却2000毫米以上。湖面万千飞鸟，湖中鱼群游弋，其西北面是面积广阔的芦苇地。出售芦苇成为当地百姓重要的经济来源之一，但总收入并不高。

材料二　博斯腾湖是淡水湖，但是南侧不远有一个槽状盐沼池，池壁和底部均分布有厚厚的盐层。下图为盐池附近的地质剖面示意图。

越中览古
李白
越王勾践破吴归，义士还家尽锦衣。
宫女如花满春殿，只今惟有鹧鸪飞。