七年级英语三单元范文(精选23篇)

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七年级英语三单元范文 第1篇

Do you know folk songs? Ballads are now one of the most popular music styles. I like folk song very much, and I fell in love with it after listening to folk song once. If you like folk music, you must know Stephen Foster. I like Stephen Foster, he is a famous folk composer, he is one of the most famous American songwriters, his music works once made a sensation. He's been playing guitar since he was two! When he was ten years old, he could play many songs. He hates school and is only interested in music. When he was 18, he began to compose music. He and his works are so famous, he is really great, he is my idol!

And I also know that there's a Country Music Hall of Fame Museum in Nashville, and there's a lot of famous musicians and singers who do a lot of music concerts there, like Carth Brooks. Folk song is a traditional style of music popular in the southern United States. Now a lot of English is about modern life, their lyrics are about money and success and so on, just about a small group, not the whole group. Folk songs often express rich feelings. They are close to People's Daily life and symbolize the beautiful days. Folk songs tell us that the best things are in our lives and that they are not expensive -- freedom, laughter, friends, family, and beautiful natural scenery. Folk song's tune is easy and melodious, the lyrics are very meaningful, so I like folk song so much.

七年级英语三单元范文 第2篇

初一下册生物第三单元知识点

第一章 生物圈中有哪些绿色植物

1、生物圈中的绿色植物类群有：藻类植物、苔藓植物、蕨类植物、种子植物，其中前三种植物生长到一定的时期会产生一种叫做孢子的生殖细胞。因为通过孢子进行繁殖，所以又称为孢子植物(没有

种子植物)。

2、藻类植物大多数生活在水中(如 淡水：水绵，衣藻 海水：紫菜、海带) (1)形态结构：没有根、茎、叶的分化。

(2)营养方式：藻类植物细胞里都含有叶绿素能进行光合作用，营养方式为自养。

(3)繁殖方式：用孢子进行繁殖。

3、藻类植物在生物圈中作用：

(1)生物圈中氧气的重要来源

(2)水生生物的食物来源(如 鱼类饵料)

(3)供食用(如 海带 紫菜)

(4)药用

4、苔藓植物大多数生活在陆地上的潮湿环境(葫芦藓、地钱、树干苔藓)。

(1)形态结构：一般都很矮小，通常具有类似茎和叶的分化，但是茎中没有导管，叶中也没有叶脉，根非常简单，称为假根(只起固定植物体作用)。

(2)营养方式：苔藓植物细胞里都含有叶绿素，能进行光合作用

(3)繁殖方式：用孢子(生殖细胞)进行繁殖。苔藓植物是监测空气污染程度的指示植物。

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七年级英语三单元范文(精选23篇)

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