中小学教育资源及组卷应用平台
Unit 1 Science and scientists答案
PART 1
I. 1. decrease 2. contradictory 3. proof 4. infection
II. 1. link 2. severe 3. transform 4. handle
III. 1. subscribe to 2. Thanks to 3. once and for all
PART 2
I. 1. initial 2. protein(s) 3. finding 4. virus
II. 1. what 2. that 3. why 4. how
PART 3
I. 1-4 bcda
II.
1. The scientist decided to come back and defend his country after the war broke out.
2. He came down with the disease two weeks ago and has now fully recovered.
21世纪教育网(www.21cnjy.com)中小学教育资源及组卷应用平台
Unit 1 Science and scientists
PART 1 Reading and Thinking
I. 根据提示写出所缺单词的正确形式。
1. A study showed how light can give milk a funny flavor and __________ (降低) its nutritional value.
2. Faced with two apparently c__________ statements, we must try our best to make the right decision.
3. Only when each logical step has been checked by other mathematicians will the __________ (证明) be accepted.
4. Until now scientists had very little clear evidence about the drug's role in preventing further __________ (感染).
II. 选用方框内合适的内容替换下列句子中的画线部分（每项限用一次）。
severe, handle, link, transform
1. The study demonstrated a direct connection between smoking and lung cancer.
2. Experts warned that improper use of this new medicine could lead to serious unpleasant reactions.
3. It takes a bit longer to change the atmosphere so that human beings could live there.
4. She thought that if she armed herself with all the knowledge she could gather, she could solve any problem.
1. __________ 2. __________ 3. __________ 4. __________
III. 根据括号内的汉语提示完成下列句子（每空一词）。
1. Most physicists in those days didn't __________ __________ (赞同) Einstein's theory of relativity.
2. __________ __________ (幸亏) the invention of cars, people soon had a freedom of movement.
3. Scientists expressed their confidence that malaria would be defeated __________ __________ __________ __________ (彻底地).
PART 2 Learning About Language
I. 选用方框内合适的内容并用其正确形式完成下列句子（每项限用一次）。
virus, protein, initial, find
1. Borlaug's __________ projects were limited to developed regions of the continent.
2. According to the doctor, most people consume far more __________ than they actually need.
3. More research seems to be needed, however, as the new __________ conflicts with other studies.
4. It is very shocking to find out that someone you see every day is carrying a potentially deadly __________.
II. 用正确的连接词完成下面短文。
In 1831, a young naturalist called Charles Darwin boarded a ship called the Beagle and set out on a fantastic five-year voyage (航行) around the world to study and collect animal, plant and rock samples.
The large variety of species was 1. __________ amazed Darwin on his adventure. The Beagle visited the Galápagos Islands and while he was there Darwin collected samples and made notes that would eventually change the way people thought about the world.
What came to Darwin's notice was 2. __________ although the different islands had similar creatures and plants, many seemed to have adapted to suit their local environments. Finches, a type of bird, for example, had different beaks (喙) on each island, suited to eating the particular seeds or insects found there. He also noted remarkable differences between the mockingbirds found on San Cristóbal, Floreana and two other islands. After he returned to England, what he tried to figure out was
3. __________ they varied from place to place.
In 1858, Darwin revealed his theory of evolution (进化) by natural selection, to explain 4. __________ animals adapted to their environment to survive. And the following year, he published On the Origin of Species — a book that would change the world forever!
PART 3 Using Language, Assessing Your Progress & Video Time
I. 从a-d中找出句1-句4的后半句（每项限用一次）。
1. The experiment shows 2. Aside from regular ice, 3. The evidence proves that 4. If you heat and stir the juice for about twenty minutes, a. it will become sugar. b. the possibility of long-term food production on Mars. c. water can exist in the form of unusual solids. d. local people are better at looking after their environment than anyone else.
1-4 ____________________
II. 根据括号内的提示将下列句子翻译成英语。
1. 战争爆发后，这位科学家决定回来保卫祖国。 （defend, break out）
_________________________________________________________
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2. 他两周前得了这种病，现在已经完全康复了。 （come down）
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