Plastic is the panacea of the ages. Nearly every man-made object (1)_____ (2)_____ of, or
Plastic is the panacea of the ages. Nearly every man-made object (1)_____ (2)_____ of, or at least (3)_____ its very structure, to this wonder compound. Rain slickers, computer terminals, automobile engine parts, coffee cups (and the sugar stirrers too), breast implants, toy soldiers—they are all made up of plastic, or one of its many (4)_____ Since the (5)_____ of civilization, humankind bas been experimenting (6)_____ a multifunctional material—one that had to be equally strong and lightweight—to carry, contain and protect valuables. (7)_____ it could carry, contain and protect humans too, even better. Generations of tinkerers and scientists set off (8)_____ the challenge, striking gold some 170 years ago. By mixing natural rubber with sulphur they created the world's most utilized material ever. In developing a (9)_____, malleable and durable substance, the most important inventions of the industrial age were to follow shortly thereafter. The automobile and airplane industries, to (10)_____ just two, owe their very existence to plastic. And, (11)_____ celluloid plastic strips, the Lumiere Brothers would never have brought moving pictures to the big screen.
The development of plastic is a story of human (12)_____, ingenuity and luck. (13)_____ the legend now goes, in 1839, the American inventor Charles Goodyear (the famous tyre company would later use his name) was experimenting with the sulphur treatment of natural rubber when he dropped a piece of sulphur-treated rubber on a stove. The heat seemed to give rubber (14)_____ properties. It was stronger, more (15)_____ to abrasions more elastic, much less (16)_____ to temperature, (17)_____ to gases, and highly resistant to chemicals and electric (18)_____ Eyeing this as a cheaply and easily reproduced construction material, a whirlwind of work (19)_____ and the birth of (20)_____ plastic and plastic-derivatives were born from camphor to celluloid to rayon; cellophane, polyvinyl chloride (or PVC); styrofoam and nylon were soon to follow.
A.consists
B.comprises
C.constitutes
D.composes
时间:2023-01-16 14:06:46
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According to Annex V to MARPOL 73/78,garbage containing plastic is permitted to be disposed of by().
A . Incinerating offshore
B . Discharging when at least 12 nautical miles from nearest land
C . Grinding to less than 1 and discharging at least 12 nautical miles from nearest land
D . Grinding to less than 1 and discharging at least 25 nautical miles from nearest land
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One of the signs of the awakening of the American Indians is()
A . the reappearance of the"powwow"
B . the legal steps they are taking to recover land and resources that have been grabbed form them illegally
C . their refusal to live on reservations
D . None of the above
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One of the benefits of the new model is that it is easier()than the old one.
A、operating
B、to be operated
C、to operate
D、operated
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The center of volume of the immersed portion of the hull is called the().
A . center of buoyancy
B . center of flotation
C . center of gravity
D . tipping center
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()is housed in a plastic dome for weather protection.
A . The funnel
B . The messroom
C . The galley
D . The satellite anternna
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Unless it is specially agreed otherwise,the adjustment of the claims to contribution takes place()and is governed by the law of the place of delivery of the cargo.
A . before the conclusion of the voyage
B . after the conclusion of the voyage
C . as soon as the expenditure occurs
D . before or after the conclusion of the voyage
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The complement of a product of variables is equal to the sum of the complements of each variable is a statement of DeMorgen's theorem
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自2004年Thompson在Science发表“Lost at the sea: Where is all the plastic”以来,海洋塑料污染受到环境学家越来越多的关注。微塑料一般认为是粒径小于( )的塑料颗粒。
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The most widely accepted theory of the origin of the name of Easter is that it is from the name of an Old German goddess.
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\Beauty is in the eye of the beholder\ means the perception of beauty is subjective.
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Some of the plastic bags can’t ____ after June 1.
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The purpose of argumentation is to inform and the purpose of exposition is to persuade.
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It is said that those people can______ the plastic sheet into money, but I don't believe it at all.
A.contrast
B.contribute
C.convert
D.convince
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Another theory is that the geography of the area is responsible for the disappearances of the ships and planes.
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You’d better think about the environmental effect of the shopping_____ you use the plastic bags.
A.despite
B.when
C.if
D.because
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The President of the United States is head of the branch of
A.legislative.
B.executive.
C.judicial.
D.party.
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If B is the midpoint of line segment AD and C is the midpoint of line segment BD, what is the value of AB/AC?
A.3/4
B.2/3
C.1/2
D.1/3
E.1/4
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听力原文: Cosmetic surgery, also known as "plastic" surgery, is the science of changing the way a person looks by reshaping a part of the body. The science of beauty has changed with time, but the desire for beauty remains the same. Today I am going to talk about how the changes of fashion have led to the new modem age of cosmetic surgery.
In the 1700s, height and weight became an important part of beauty. During the time of the French Revolution, many women used to wear corsets, belts that made their waists appear much slimmer. In England in the 1500s, makeup became an important part of beauty. Some women used to paint their .face white. They thought this made them more attractive. Later, in North America, some women used to eat arsenic, a dangerous poison, to make their faces whiter. By the 1860s, American women started using makeup to make themselves more charming. In the 1890s, Americans discovered that bicycle tiding could actually improve their appearance! They exercised in order to look and feel better. The popularity of bicycle riding even led to a change in fashion. American women began to wear shorter skirts instead of the. traditional long, full ones.
Although diet and exercise are still popular ways of improving one's appearance, there are some parts of the body that cannot change without the help of a cosmetic surgeon. In the past, American women used to spend weeks repeating words that started with the "P" because they wanted to change the shape of their mouths. Today a cosmetic surgeon can reshape the nose or lips in a few hours. Rhinoplasty, the reshaping of nose, can greatly improve a person's image.
Surprisingly, cosmetic surgery has been used for centuries in China and India. Today it is used in many countries to improve the outlook of people who have been hurt in fires or in car accidents It is also used to improve the appearance of children who are born with physical problem.
Questions:
15.What is the topic of the lecture?
16.What did women in North America do to improve their appearance in 1890s?
17.What do you think is the speaker's attitude towards rhinoplasty?
18.Which statement is NOT true according to the lecture?
(35)
A.Why people will take plastic surgery.
B.How cosmetics develop in its long history.
C.How the change of fashion led to the development of cosmetic surgery.
D.How people from all over the world make themselves look better.
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Surely, the state of Hawaii is to the northwest of Canada, and the state of Alaska is in the Pacific Ocean, southwest of California..___()
是
否
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The setting of the story is in India and the time of the story is during the World War.()
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B3U2 plot 练习.docx Read the story and find out the five elements of the story. What is the exposition of the story? what is the conflict? what is the rising action of the story? what is the climax? wha
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Of all the states of America,______is the smallest of the country while Alaska is the largest one.
A.Maine
B.Utah
C.Rhode Island
D.Kansas
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请选出下列包含从句最少的一句 (单选) 1) In the past, suffering from the shortage of material supplies, people always cherished things they owned. 2) In order to solve the problem, governments' discerning intervention and guidance, such as making laws and encouraging eco-friendly economy, can make a difference. 3) Many people believe that the human society has developed into a throwaway society, which is filled with plastic bags and rubbish. 4) So that is why our
A.1)
B.2)
C.3)
D.4)