学术英语(理工)详解答案_Unit 3

Unit 3 Listening to Lectures
2 Paying attention to the introduction
Unit 3 Listening to Lectures
2 Paying attention to the introduction
A lecturestening to Lectures
1 Preparing for listening to a lecture
1 What are the definitions of the following terms?
1) CO2: is a greenhouse gas which plays a major role in global warming and anthropogenic climate change. It is also a major source of ocean acidification which dissolves in water forming carbonic acid.
1 Preparing for listening
to a lecture
Unit 3 Listening to Lectures
1 Preparing for listening to a lecture
Tips before listening to a lecture:
1) Find out the topic of the lecture to be delivered.
Unit 3 Listening to Lectures
1 Preparing for listening to a lecture
4 What are the potential effects of global warming? The effects of global warming may be physical, ecological, social or economic. Evidence of observed climate change includes the instrumental temperature record, an increase of extreme weather events (such as hurricanes, earthquakes, volcanoes, and landslides), rising sea levels, decreased snow cover in the Northern Hemisphere, mass animal extinctions and human migrations.
2) Research the topic by reading the related sources or the assigned readings.
3) Familiarize yourself with the subject and list out questions if possible. 4) Sort out subject-specific words and terms the lecture
2) ozone layer: is a layer in Earth’s atmosphere containing relatively high concentrations of ozone (O3).
Unit 3 Listening to Lectures
1 Preparing for listening to a lecture
1 What are the definitions of the following terms?
3) greenhouse: is a structure with different types of covering materials, such as a glass or plastic roof and frequently glass or plastic walls; it heats up because incoming visible solar radiation from the sun is absorbed by plants, soil, and other things inside the building. 4) methane: is the simplest alkane, the main component of natural gas, and probably the most abundant organic compound on earth. The relative abundance of methane makes it an attractive fuel.
Unit 3 Listening to Lectures
1 Preparing for listening to a lecture
1 What are the definitions of the following terms?
5) Kyoto Protocol: is a protocol to the United Nations Framework Convention on Climate Change (UNFCCC or FCCC), aimed at fighting global warming.
Unit 3 Listening to Lectures
2 Paying attention to the introduction
Read the following introductions of two lectures and guess the topic and content of each of them.
1
Topic:
Computer Ethics
Content: The proper ethical behavior of computer users 2 Topic: Dyslexia---Learning Problems Content: The analysis of the causes of dyslexia and doctor’s explanation of it
6) deforestation: is the removal of a forest or stand of trees where the land is thereafter converted to a nonforest use.
Unit 3 Listening to Lectures
Telling an interesting story or an anecdote
Introducing the points to be covered in the talk directly
Unit 3 Listening to Lectures
2 Paying attention to the introduction
3 Understanding the ideas through examples
4 Following a lecture through signal words
5 Memorizing the points by taking notes
Unit 3 Listening to Lectures
1 Preparing for listening to a lecture
1 What are the definitions of the following terms?
7) chlorofluorocarbon: is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ethane.
may use.
Unit 3 Listening to Lectures
1 Preparing for listening to a lecture
Tips before listening to a lecture:
5) Check the meanings and pronunciations of the terms and words. 6) Bring loose leaf paper or spiral bound notebooks. Or bring a laptop if you prefer to take notes on it and if the room is set up with ample power outlets and space.
2 What is the relationship between carbon dioxide, greenhouse gases and the thinning ozone layer with global warming? Carbon dioxide is a greenhouse gas. Burning oil, coal and fossil fuels leads to a sharp increase in the greenhouse gas which build up and condense, forming a thick gas layer of carbon dioxide. This gas traps heat from the sun and destroys the ozone layer, the layer which protects the Earth from harmful radiation, causing global warming.