内容正文:
Unit 4 Living with technology
Workbook
Building Skills
1
How big is one nanometre?
Jake and his Science teacher are talking about a lecture on nanotechnology. Listen to the conversation and decide whether the following statements are true (T) or false (F). Circle the incorrect information in the false statements and correct it in the blanks.
1. With the development of nanotechnology, it may be possible to take an elevator up into space. T/F
T
2. Miss Wang gives an example of how nanotechnology may help reduce water pollution. T/F
F (water→air)
Listening and speaking
A1
3. A nanometre equals a billionth of a metre. T/F
T
4. A human hair is about 100,000 nanometers wide. T/F
_____ F(1000,000→80,000)_________________
5. Nanotechnology deals with structures that are less than 1000 nanometres long. T/F
F(1000 → 100)
Listening and speaking
A1
Potential applications of nanotechnology
Supermaterials
Killing bacteria
Getting rid of (1) ___________________
Detecting (2) ________________
Identifying spoiled food
A university professor is explaining potential applications of nanotechnology. Listen to the lecture and complete the notes below.
bad smells
poisons
Listening and speaking
A2
5
Nanofactories
Building (3)______________inside the body
Producing (4) _______________for self-powering devices
Making things from food to fue