Unit 5 Section Ⅴ (2) Listening and Speaking（Word教参）-【步步高】2024-2025学年高二英语选择性必修第一册学习笔记（外研版）

Section Ⅴ　Using language(2)—Listening and Speaking Ⅰ.Listen to the podcast on P71 and choose the best answer.(高考形式) 1．What are they discussing in the programme? A．Microscope. B．Microorganisms. C．Science. 答案　B 2．Why are bacteria useful? A．They make people’s stomach turn. B．They help people digest. C．They consume cheese. 答案　B 3．Which of the following is true? A．All the bacteria are not bad. B．Bacteria can offer nutrients. C．Bacteria can break down toilet. 答案　A Ⅱ.Listen to the passage and fill in the blanks to complete it.(精听训练) Jenny：Hello，and welcome to Science Under the Microscope，a science programme for teens.I’m Jenny. Josh：And I’m Josh. Jenny：This week，as part of our series on biodiversity，we are discussing microorganisms.They are the oldest form of life on Earth.Scientists believe they first 1.emerged around three and a half billion years ago! Josh：That’s incredible! Jenny：But you can only see them with a microscope，as these living things are very very small.We’re talking about life at the level of the cell.Do you know about 2.cells，Josh? Josh：Erm...I’m afraid not.What exactly is a cell? Jenny：Every living thing is made up of cells.They are like 3.bricks that are used to build houses.By the way，most microorganisms are single­celled.This means that they 4.consist of just one cell. Josh：How strange! Jenny：Actually，we’re the ones who are unusual.The vast 5.majority of life on this planet is made up of single­celled microorganisms.They’re everywhere! In the air，in water，there are even microorganisms...inside you.I’m talking about bacteria.Have you heard of bacteria，Josh? Josh：I have，Jenny.But bacteria，inside me? Yuck! Jenny：[laughs]That’s right.You have lots of them living in your body.In fact，an average human body 6.contains about thirty trillion human cells，and around thirty­nine trillion bacteria cells. Josh：Seriously? Oh，this is making my stomach turn. Jenny：Speaking of which，most of the bacteria in your body help with digestion.And they help make the food that goes into your stomach，too.7.Without bacteria，we wouldn’t be able to make cheese，yoghurt，vinegar... Josh：Really? I didn’t know that! Jenny：Oh，and bacteria are also 8.useful at the other end of the food production process.They have an important role dealing with your waste and that of other 9.organisms. Josh：Euw! You mean what goes down the toilet? Jenny：Yes.Bacteria break down this waster and other dead，organic matter，like fallen leaves，into nutrients. Josh：Oh I get it.And these 10.nutrients go back into the soil where they can be used by plants! Jenny：That’s it exactly. Josh：All right.Although some of the bacteria may cause diseases in humans，plants and animals，they aren’t all bad... 学科网（北京）股份有限公司 $