step by step 第四册 lesson 137

UNIT 69   POPULAR SCIENCE (Ⅱ)

           Lesson 137

  Part Ⅰ Warming-up Exercises

   Instruction-following: Square or Circle?
   1.               2.   
   3.               4.   
   5.               6.   
   7.               8.   
   9.               10.   
             
              Score: _______


     Part Ⅱ  Preserving The Environment

      Vocabulary

   1. deteriorate
   2. assail
   3. spring up
   4. breeding
   5. insecticide
   6. spray
   7. bronchial
   8. smog
   9. foul

               Notes

    An early sign of environmental limits was the air pollution of the
industrial revolution, brought on by the burning of coal to run mills
and machinery¹. It was not until after World War Ⅱ, however, that
pollution came to be viewed by many as a threat to the health of the
planet. By the 70s many organizations and governments were seeking
means of controlling pollution.
    Current evidence strongly implicates² various pollutants³ in numerous
human health problems: cancer, birth defects, genetic⁴ changes, etc.

       Student Evaluation

  My general Impression Content:
   ____ helpful _____ adequate
   ____ inadequate
  Level Of Difficulty:
   ____ easy ____ fair
   ____ difficult
   My Major Problems
   ____ understanding meanings
   ____ selecting major points
   ____ organizing facts
   ____ retaining concepts
   My Comprehension Score
   __________________________

Exercises:
Ⅰ. 1. What problem has become the focus of attention recently?
    2. Is the issue considered to be very important now? How do you
know?
    3. What has happened to the people living near airports?
    4. Why do housing companies prefer to build high-rise buildings?
    5. How does the construction of large office blocks affect
environment preservation⁵?   
    6. In what way is the motor car responsible for the changes in the
environment?
    7. What are the results of the large-scale use of insecticides?
    8. What counter measures have been introduced recently against
environmental destruction?
    9. What is smog?
   10. What has caused river pollution?

Ⅱ. Problems:
    1. noise pollution
    2. construction of ugly high-rise buildings
    3. air pollution
    4. loss of rural population
    5. loss of balance in ecology
    6. food contamination
    7. water pollution

    Causes: ...


      Part Ⅲ   Recycling Waste

      Vocabulary

   1. recycle
   2. complex
   3. take shape
   4. newsprint
   5. spike
   6. crusher
   7. roller
   8. magnet
   9. Warren Spring

              Notes

    Most of the solid waste in many cities is still simply deposited in
open dumps. This practice causes proliferation of rats and flies,
encourages growth of diseases, and also contaminates surface and
underground water. So management of solid waste presents an
increasingly acute problem in the modern world.

      Student Evaluation

  My general Impression Content:
   ____ helpful _____ adequate
   ____ inadequate
  Level Of Difficulty:
   ____ easy ____ fair
   ____ difficult
   My Major Problems
   ____ understanding meanings
   ____ selecting major points
   ____ organizing facts
   ____ retaining concepts
   My Comprehension Score
   __________________________


Exercises:
Ⅰ. 1. _______________________
    2. _______________________

Ⅱ.
            Outline

   A. Project 1
      1. Purpose and plan: a. to take a city of ______________ and
discover exactly what _________________ and what _______  b. to find
out ______________ could be provided if the plant were built.
      2. Possible waste to be recycled: not only _________, but also
__________
      3. Ideas already made use of: a. to remove _________________ b.
to obtain valuable oils and gases from _______________
      4. New idea: to ________ on a large scale in _____________
designed to __________________.

   B. Project 2
      1. Purpose and plan: to discover best ways of __________________
      2. Possible steps:
         a. to tear open _______________
         b. to separate ________________
         c. to break up ________________
         d. to remove __________________

1 machinery   

n.(总称)机械，机器；机构

参考例句：

• Has the machinery been put up ready for the broadcast?广播器材安装完毕了吗？
• Machinery ought to be well maintained all the time.机器应该随时注意维护。

2 implicates   

n.牵涉，涉及（某人）( implicate的名词复数 )；表明（或意指）…是起因

参考例句：

• This confession implicates numerous officials in the bribery scandal. 这一供认会使许多官员牵连到受贿的丑事中。 来自辞典例句
• Did you tell him that the recording implicates President Logan in Palmer's assassination? 你有没有告诉他录音显示洛根总统跟帕尔默被杀有关？ 来自电影对白

3 pollutants   

污染物质（尤指工业废物）( pollutant的名词复数 )

参考例句：

• Pollutants are constantly being released into the atmosphere. 污染物质正在不断地被排放到大气中去。
• The 1987 Amendments limit 301(g) discharges to a few well-studied nonconventional pollutants. 1987年的修正案把第301条（g）的普通排放限制施加在一些认真研究过的几种非常规污染物上。 来自英汉非文学 - 环境法 - 环境法

4 genetic   

adj.遗传的，遗传学的

参考例句：

• It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
• Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。

5 preservation   

n.保护，维护，保存，保留，保持

参考例句：

• The police are responsible for the preservation of law and order.警察负责维持法律与秩序。
• The picture is in an excellent state of preservation.这幅画保存得极为完好。