(共24张PPT)
Unit2 Reading
Top10 inventions in 20th century:
NO. 10
atomic bomb
NO. 9
space shuttle
NO. 8
television
NO. 7
artificial satellite
NO. 6
aspirin
Airliner
NO. 5
NO. 4
personal computer
NO. 3
Mobile phone
NO. 2
internet
NO. 1
cloning
How much do you know about cloning?
Cloning is a way of making an exact copy of another animal or plant. It can be divided into natural clone and man-made clone.
A natural clone is one that occurs in nature and a man-made clone is one that is produced through human intervention(介入,干预).
克隆马及其“母亲兼姐姐”
How is a clone made?
Is cloning good for the world?
Commercial use : A strawberry plant
一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗
Organization ( first reading)
_____ What is the cloning.
_____ Two major uses of cloning.
_____ The progress and effect of Dolly.
_____ Controversy of application to human
2
1
3-4
5
reading para.1 &2-----"True" or"False"
1. Cloning means making a copy of an animal or a plant.
2. Gardeners can make money by cloning plants.
3. Cloning animals is as complicated as cloning plants.
F
T
F
4. Dolly the sheep was the first successful clone of a mammal.
5. cloning is valuable for research on new species and medical use.
T
T
1. The sheep that donated the somatic cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 12
推理判断
“Dolly’s illnesses were more appropriate to a much more older animal” means that ___.
Dolly’s illness would make Dolly become old
B. Dolly would have such illness when it become older
C. Young animals like Dolly’s age shouldn’t have such illness
1. What is the writing style?
A. Expositive (说明性的) B. Descriptive
C. Argumentative (议论性的) D. Narrative
3.The writer’s reaction towards cloning is____
A. Positive B. Negative C. neutral
2.From the text we can see that some people _________ the human cloning while others_________ it.
are against
are for
problems of cloning
1. Animal clones may develop the illnesses of older animals.
2. Animal clones may die younger
than the donor animals.
4. There are moral objections to clone human beings.
3. Evil leaders want to clone themselves
Advantages of cloning
Medical cloning could produce cures for serious illnesses in humans.
2. Cloning plants can produce plants of similar quality for sale.
3. Cloning plants can be useful for research on new plant species.
4. Cloning can help save endangered animals.
Consolidation
Clone is a way of making an exact_______ of another animal or plant. Cloning have two ______ uses. Firstly, gardeners use it all the time to produce _____________quantities. Secondly, it is valuable for research on new plant _________and for medical research on animals. But through the _________and death of Dolly, cloning has a lot of problems. On the other hand, we know cloning is controversial in some countries for ________and ___________reasons.
copy
major
commercial
species
birth
moral
religious