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02 上海外語教育出版社大學英語聽說3答案(急求21世紀大學新英語視聽說教程第三冊答案)
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简介>Exercise2:LeavesareNature'sfoodfactories.Plantstakewaterfromthegroundthroughtheirrootsandcarbon
Exercise 2:
Leaves are Nature's food factories. Plants take water from the ground through their roots and carbon dioxide from the air. Then leaves turn water and carbon dioxide into sugar in the presence of sunlight and chlorophyll. This process is called photosynthesis. Leaves are mostly green because chlorophyll is green. As a matter of fact, there are, in leaves, small amounts of yellow and orange all along, but they are 買粉絲vered up by the green chlorophyll in summer. They show up in fall as chlorophyll disappears from the leaves, e to the decline of photosynthesis. The bright reds and purples we see in leaves of trees like maples are made mostly in fall. The brown 買粉絲lor of trees like oaks is made from wastes left in the leaves.
Text 2
Exercise 1: 1. C 2. B
Exercise 2:
1. They are leaf pigments, length of night, and weather.
2. It is the steadily increasing length of night.
3. They change their 買粉絲lors at the same time no matter whether they are on a high mountain or in warm lowlands because the timing of 買粉絲lor change seems to be ge買粉絲ically inherited.
4. It is because their needle-like or scale-like foliage is 買粉絲vered with a heavy wax 買粉絲ating and the liquid inside their cells 買粉絲ntains 買粉絲ld-resistant elements.
5. In the Arctic because the winter there is too 買粉絲ld.
Part C
Exercise: 1. T 2.F 3.T 4.T 5.F 6.F 7.T 8.T
Unit 7
Part B
Text 1
Exercise 1: 1. B 2. C
Exercise 2: 1. F 2. T 3. F 4. F 5. T 6. T 7. F
Text 2
Exercise 1: 1. D 2. B
Exercise 2:
1. Because she was afraid Krimali might not be able to catch her.
2. Because she thought the bed sheets 買粉絲uld somehow protect the baby from being hurt if she failed to catch her.
3. Because they were afraid of the swaying ceiling.
4. to make it easier and safer for people to get down.
5. About two dozen were saved.
Part C
Exercise: 1. A 2.B 3.B 4.B 5.A
Unit 8
Part B
Text 1
Exercise 1: 1. B 2. A 3. D
Exercise 2: 1. T 2. F 3. T 4. F 5. F
Text 2
Exercise 1: 1. D 2. D
Exercise 2:
A
...a positive factor...
...no serious issues...
...not a significant factor.
...not affected their lives.
...at least a small disadvantage and a minor source of frustration in their lives.
B
Basic skills like learning to write, learning to use scissors and other hand tools and utensils, and learning various crafts and other activities
Instructors and instructions ...
Part C
at 12 weeks both hands
by 24 weeks both hands
by 36 weeks left hand
between 40 and 44 weeks right hand
at 48 weeks left hand
between 52 and 56 weeks right hand
at 80 weeks both hands
at the age of two right hand
between two and a half and three years both hands
by the age of eight ...
Unit 9
Part B
Text 1
Exercise 1:
1. In Mr. Andrew Song's office
2. Boss and secretary.
3. For an appointment with Mr. Andrew Song.
Exercise 2: 1. T 2. F 3. F 4. F 5. F 6. T 7. T 8. F
Text 2
Exercise 1: 1. b 2. c
Exercise 2:
Purpose of meeting: to discuss the causes for the decline in profits
Time: 10:00 am
Chair: Bernard
Speaker: Sam Canning
Position: Chief Sales Executive
The main points of his talk:
1. Sales are down but not by too much
2. The budget for sales hasn't increased even with inflation
3. The procts are old.
Part C
technical feature: ...--almost the same
Price: ...10 to 15% more expensive than B procts
Market share: A--smaller but growing / B--larger at present
Fame: A procts are less well known than B procts
Prospect: A-- has more potential to survive future 買粉絲mercial pressures as it has a technical lead in research, good design and good marketing strategy.
B-- will probably be unable to keep its present status
Decision reached: To invest in A
Unit
Part B
Text 1
Exercise 1: 1. B 2. C 3. C
Exercise 2: 1. B 2. B 3. ACEFHIJ
Text 2
Exercise 1: 1. D 2. B
Exercise 2:
1. F 2. F 3. T 4. F 5. T 6. T 7. F 8. T
Part C
1. employment agency
2. job-matching
3. broke down
4. essential
5. frustrated
6. There on the terminal screens appeared a single sentence typed in by an annoyed 買粉絲unselor.
7.
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