全國(guó)大學(xué)英語(yǔ)四級(jí)聽力理解部分由短篇新聞、長(zhǎng)對(duì)話和聽力篇章構(gòu)成。試題采用選擇題（單選題）題型。聽力理解部分的分值比例為35%，其中短篇新聞?wù)?%，長(zhǎng)對(duì)話占8%，聽力篇章占20%?？荚嚂r(shí)間約25分鐘。2020年上半年第二次全國(guó)大學(xué)英語(yǔ)四級(jí)考試將在9月19日舉行，希賽網(wǎng)英語(yǔ)四六級(jí)頻道將會(huì)第一時(shí)間為大家搜集整理2020年9月英語(yǔ)四級(jí)真題聽力及參考答案（聽力篇章）。大家可以先參考2019年下半年的四級(jí)聽力真題（聽力篇章）。請(qǐng)大家收藏此頁(yè)面，小編將在考后為大家更新此頁(yè)面。

Section C

Passage 3 人體肌肉酸痛的原因、恢復(fù)與緩解

After tough workout or a day full of physical activity, it’s common to find your muscles aching, but where do these pains come from? [22] According to a German professor, the soreness comes from straining your muscles in an uncommon way, for example, jumping on a bicycle for a ride, because you haven’t ridden in a long time. Soreness occurs since your leg muscles aren't used to that movement. When muscles perform an activity they aren’t regularly expose to, the tiny fibers that are inside them are being torn apart. As muscle soreness develops, the body has to work to repair the muscle tears, but this doesn’t happen immediately. [23] First, the body must realize the muscles are damaged. When the body realizes the muscles are hurt, the response is to increase blood flow to the area and increase body heat, damaged cells are then cleaned up and the body sends cells specially designed to break down the large muscle fiber fragments. Healing can take place after this. It takes about a day until these cells make it to your aching muscles. That’s why there is most often a delay associated with muscle soreness. Repair of damaged cells takes [24] about two days, and afterwards the soreness disappears. Unfortunately, there is little that can be done to relieve muscle soreness. Pain relieving creams don’t work, but [25] a hot shower, or warm bath can provide some relief.

Questions 22-25 are based on the passage you have just heard.

22. What does the German professor say about muscle soreness?

D) It comes from straining one’s muscles in an unusual way.

23. What happens when muscles are damaged according to the passage?

A) Blood flow and body heat increase in the affected area.

24. How long does it take for damaged cells to heal?

B) About two days.

25. What does the speaker suggest one do to relieve muscle soreness?

C) Have a hot shower.