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Interesting grassland reading answers

1, this article comes from warm in winter and cool in summer, noise reduction and dust collection (fill in the number of words not exceeding the limit. The important role of grassland in human life is explained in the following aspects.

2. Analyze underlined sentences:

① In terms of expression, they are all narratives.

② From the specific function point of view, ① sentence is the general sentence of the full text. ; The second sentence plays a connecting role; Sentence ③ is the conclusion sentence of the second paragraph.

The reason why the two words "a lot" added in the first paragraph cannot be deleted is because if they are deleted, the meaning is wrong, which means that they may not be able to absorb a lot of oxygen.

According to the above characteristics, point out the defects of the third paragraph, and then make only two changes to the original text.

Trouble: there is no mention of how grass reduces noise intensity.

Modification method: add an example about low noise intensity of grassland energy price.