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5. The office building is in the east of the campus. (in the south of, to the west of, in front of, behind, at the back of, )

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4. They are opposite the door. (on the left / right of the room.)

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3. Next to it is a bed. (In front of it, At the back of, In the middle of, To the right of )

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2. Above the bed, there is a large painting of the blue sea. (On the right of the room,)

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1. There is a tall shelf on the left of my room. (on the right of, in the front of, near the window, )

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3. 学习并牢记下面的短语和句型

   表空间顺序

   in front of, in the front of, at the back of,

   on the right (left)side

   close to , next to, opposite, across,

   inside, outside

   in (to)the south / east / west / north

   on one side …, on the other side(of)

   常用短语和句型:

   方位

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2. 描述性文章的结构

   (1)人物:

   开头应有简明的介绍

   文章的主体部分可按时间或事件的主次进行描述

   结尾进行评论或谈感受

   (2)地点:

   要学会准确地表示方位的词或短语

   描述地点的位置通常由上至下,从里到外,从左至右,从远到近。

   总之,无论是描述人物,还是地点、环境,都要详略得当,重点突出。

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I. 特点及常用结构

1. 描述性文章是把人物、事件、景观、地点、环境等用生动的语言,形象地描绘出来。

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   描述性写作

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5.铜绿:Cu2(OH)2CO3  6.纯碱(碱面): Na2CO3  7.王水: HCl,HNO3 (3:1) 8.水玻璃(泡火碱) :Na2SiO3  9.小苏打:NaHCO3  10.苏打:Na2CO3  11.大苏打(海波):Na2S2O3 12.盐卤:MgCl2·6H2O  13.雌黄:As2S3  14.雄黄:As4S4  15.朱砂:HgS  16.石棉:CaO·3MgO·4SiO2 17.砒霜:As2O3  18.泻盐:MgSO4·7H2O  19.波尔多液:CuSO4+Ca(OH)2  20.钛白粉:TiO2

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