a.In addition, no one knows whether the core is solid or not, since it cannot be directly observed.
b.But since the Sun has no solid surface, it is hard to tell where the atmosphere ends and the main body of the Sun begins.
c.Starting at the outside and going down into the Sun, the zones are the corona, chromosphere, photosphere, convection zone, and finally the core.
d.Solar astronomers know that the Sun is divided into five layers or zones.
e.The first three zones are regarded as the Sun’s atmosphere.
The following sentences are from a paragraph, but they are in the wrong order.Choose the correct order from A, B, C, and D.______
A、c-d-e-b-a
B、d-b-a-c-e
C、c-e-d-b-a
D、d-c-e-b-a
时间:2023-08-29 22:07:58
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When recovering from a disaster, the backup and restore operation you use is similar to the export/import configuration procedure, with one additional step. Which additional step must you take when recovering from a disaster?()
A . A new WebSphere profile is required to restore the configuration.
B . The restored system requires the IBM Tivoli Access Manager for e-business (TAMeb) JRTE to be manually configured against the WebSphere’s Java Runtime to allow the IBM Tivoli Federated Identity Manager (ITFIM) Runtime to function properly.
C . The ITFIM Domain needs to be created manually within the Integrated Solution Console.
D . The ITFIM Runtime instance needs to be re-registered with the TAMeb policy server by running the SvrSslCfg command.
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One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to ()
A . increase scavenge air pressure
B . reduce fuel booster pump pressure
C . adjust the fuel rack
D . retard fuel injector timing
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In the video, Michael says, many Chinese do know more than one language. They might know ___________.
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Why are people not supposed to use words “No”, or “I don’t know”, as saying “no” in Mexico?
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The article says scientists know how one-legged flamingos stand.
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No one knows about it, _______________ ?
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Young people are the source of fashion and fashion knows no national boundaries.
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And
it’s not just one of us who’ve felt the heavy hand of interference. Oh, no, all
three of us live in constant dread knowing that at any time disaster can
strike.
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It is very difficult to know people and I don&39;t think one can ever really know any but one&39;s own countrymen.
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◑Why does the professor say this:◑She is concerned that no one can understand her.◑She knows that the theories can seem strange at first.◑There is no more time to review the material.◑She wants to apologize for discussing an emotional topi
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听力原文:M: Judy, there is still plenty of space for one additional backseat passenger. You are welcome to ride with us. The only problem might be the time. You know, we need to leave at 5.
W: That's earlier than I expected. But I guess you're the only ride. Could you give me a wake-up call at 4:30 tomorrow morning?
Q: What is the woman most likely to do?
(19)
A.She will hitch a ride on the way.
B.She will go together with the man.
C.She will call on the man and wake him up.
D.She will pick up the man.
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— Do you know your results?— No, I don' t know them______.
A.already
B.since
C.before
D.yet
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The sentence “The word will prevail...” can be paraphrased as “No one will know the w
是
否
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The manager confirmed there was no additional charge for the services provided.
A.经理许诺不会对所提供的服务额外收费。
B.经理证实所提供的服务没有其他的改变。
C.经理确认没有对所提供的服务额外收费。
D.经理抱怨没有更多资金可用于提供服务。
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She didn't realize what everyone knows: namely, the expression one wears on one&3
She didn't realize what everyone knows: namely, the expression one wears on one's face is far more important than the clothes one wears on one's back.()
此题为判断题(对,错)。
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No one knows exactly how many disabled people there are in the world, but estimates suggest the figure is over 450 million. The number of disabled people in India alone is probably more than double the total population of Canada.
In the United Kingdom, about one in ten people have some disability. Disability is not just something that happens to other people: as get older, many of us will become less mobile, hard of hearing or have failing eyesight.
Disablement can take many forms and occur at any time of life. Some people are born with disabilities. Many others become disabled as they get older. There are many progressive disabling diseases. The longer time goes on, the worse they become. Some people are disabled in accidents. Many others may have a period of disability in the form. of a mental illness. All are affected by people's attitude towards them.
Disabled people face many physical barriers. Next time you go shopping or to work or visit friends, imagine how you would manage if you could not get up steps, or on to buses and trains. How would you cope if you could not see where you were going or could not hear the traffic? But there are other barriers: prejudice can be even harder to break down and ignorance inevitably represents by far the greatest barrier of all. It is almost impossible for the able-bodied to fully appreciate what the severely disabled go through, so it is important to draw attention to these barriers and sow that it is the individual person and their ability, not their disability, which counts.
The first paragraph points out that ______.
A.there are many disabled people in the world
B.the number of disabled people in India is the greatest
C.India has much more disabled people than Canada
D.it is impossible to get an exact figure of the world' s disabled people
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Many science reports discuss medical studies that test the effect of a new drug. Usually, a large number of people is divided into two groups. Each group takes a different substance. But no one knows which group is getting which substance. One group takes the medicine being tested. Another group takes what we call an inactive substance. Medical researchers call this substance a "placebo." The word "placebo" is Latin for "I shall please." Placebo pills(宽心丸)usually are made of sugar.
Using placebos to test drugs sometimes has a surprising result. Researchers say people taking the placebo often report improvements in their health. This is known as "the placebo effect"--pain that is eased or stopped by an inactive substance. In such testing, the drug must perform. better than the placebo to prove that it is effective.
Doctors have reported that the placebo effect can be used in treatment. For example, a doctor tells a patient that a new drug will stop the pain in his leg. The pill is only sugar. But the patient does not know that. He takes the pill and says his pain is gone.
Scientists are beginning to discover some physical reasons for this reaction in some people. They are learning that much of what people believe to be true comes from what the brain expects is going to happen. If the brain believes a drug will ease pain, the brain may begin physical changes in the body that can cause the expected effect. A recent examination of studies on drugs for depression found that placebos eased the depression about as well as the active drugs.
Other studies have explored the power of placebos. A study in Japan involved thirteen
people who reacted to the poison ivy (常青藤)plant. Poison-ivy causes red itchy sores(伤痕)on some people who touch it. Each person was rubbed on one arm with a harmless leaf, but was told it was poison ivy. Each person was then touched on the other arm with poison ivy, but was told it was a harmless leaf. All thirteen people developed a reaction on the arm where the harmless leaf touched their skin. Only two reacted to the poison ivy leaves.
Doctors and scientists worry that the use of placebos may not always be harmless. They say people can become victims of false doctors and others who use placebos to claim they can cure disease.
What do medical researchers usually use to make placebo pills?
A.Ivy leaves.
B.Harmless leaves.
C.Medicine being tested.
D.sugar.
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Throughout history, people have been interested in knowing how language first began, but no one knows exactly where or how this happened. However, we do know a lot about languages, the languages of today and also the languages of earlier times. There are probably about three thousand languages in the world today. Chinese is the language with the most speakers. English, Russian and Spanish are also spoken by millions of people. On the other hand, some languages in the world have less than one hundred speakers.
There are several important families of languages in the world. For example, most of the languages of Europe are in one large family called Indo-European. The original (最初的) language of this family was spoken about 4,500 years ago. Many of the present languages of Europe and India are modern forms of the language of 4,500 yeas ago.
Languages are always changing. The English of today is very different from the English of 500 years ago. Some even die out completely. About 1, 000 years ago English was a little-known relative of German spoken on one of the borders of Europe.
If a language has a large number of speakers or if it is very old, there may be differences in the way it is spoken in different areas. That is, the language may have several dialects. Chinese is a good example of dialect differences. Chinese has been spoken for thousands of years by millions of speakers. Their differences between the dialects of Chinese are so great that speakers of Chinese from some parts of China cannot understand speakers from other parts.
The first paragraph mainly tells us that ______.
A.most people in the world speak Chinese
B.there are thousands of languages in the world today
C.man has much knowledge about languages
D.some people know several languages
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The addition to total variable cost when one more unit of output is produced is called______.
A.total cost
B.marginal cost
C.fixed cost
D.average variable cost
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No one knows a child’s()towards fatness is inherited or due to the food he eats.
A.tendency
B.trend
C.intention
D.inclination
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Because of its ______nature, no one knows the exact size of the underground economy.
A.subversive
B.subterranean
C.mysteriousChidden
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Victor currently produces nuts and bolts at point a in the figure. Victor’s marginal cost of producing an additional nut is ().
A.1 bolt per nut
B.1/2 bolt per nut
C.8/6 bolts per nut
D.8 bolts per nut
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In 1939 two brothers, Mac and Dick McDonald, started a drive-in restaurant in San Bernadina, California.They carefully chose a busy corner for their location'.They had run their own businesses for years, first a theater, then a barbecue restaurant, and then another drive-in.But in their new operation, they offered a new, shortened menu: French fries, hamburgers, and sodas.To this small selection they added one new concept: quick service, no waiters or waitresses, and no tips.
Their hamburgers sold for fifteen cents.Cheese was another four cents.Their French fries and hamburgers had a remarkable uniformity, for the brothers had developed a strict routine for the preparation of their food, and they insisted on their cooks'sticking to their routine.Their new drive-in became incredibly popular, particularly for lunch.People drove up by the hundreds during the busy noontime.The self-service restaurant was so popular that the brothers had allowed ten copies of their restaurant to be opened.They were content with this modest success until they met Ray Kroc.
Kroc was a salesman who met the McDonald brothers in 1954, when he was selling milkshake-mixing machines.He quickly saw the unique appeal of the brothers'fast-food restaurants and bought the right to franchise other copies of their restaurants.The agreement struck included the right to duplicate the menu.The equipment, even their red and white buildings with the golden arches.
Today McDonald's is really a household name.Its names for its sandwiches have come to mean hamburger in the decades since the day Ray Kroc watched people rush up to order fifteen-cent hamburgers.In 1976, McDonald's had over $ 1 billion in total sales.Its first twenty-two years is one of the most incredible success stories in modern American business history.
26.This passage mainly talks abort().
A.the development of fast food services
B.how McDonald's became a billion-dollar business
C.the business careers of Mac and Dick McDonald
D.Ray Kroc's business talent
27.Mac and Dick managed all of the following businesses except().
A.a drive-in
B.a cinema
C.a theater
D.a barbecue restaurant
28.We may infer from this passage that ().
A.Mac and Dick McDonald never became wealthy for they sold their idea to Kroc
B.The location the McDonalds chose was the only source of the great popularity of their drive-in
C.Forty years ago there were numerous fast-food restaurants
D.Ray Kroc was a good businessman
29.The passage suggests that().
A.creativity is an important element of business success
B.Ray Kroc was the close partner of the McDonald brothers
C.Mac and Dick McDonald became broken after they sold their ideas to Ray Kroc
D.California is the best place to go into business
30.As used in the second sentence of the third paragraph, the word “unique” means ().
A.special
B.attractive
C.financial
D.peculiar
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The history of ice cream is amystery. No one knows exactly how and when people began to eat it. There is onestory that the Roman emperor Nero (A.D. 37—68) sent slaves to the mountains tobring back snow. The snow was served to him sweetened with honey and fruit pulp.Marco Polo (1254—1324) tasted flavored ices, too, during his famous travels inthe Far East. He brought the recipes back toItaly.
Recipesfor ices spread fromItalyto the rest of Europe in the 1500’s. The chefs of kings constantly experimentedwith new combinations to please their masters, and at some point cream andbutter were added to the recipes for ice. The new dish was called cream ice.Cream ice, molded into amusing shapes, began to be served on the tables ofkings across Europe. Louis XIV (1638—1715)surprised his court with a dessert of eggs in cups of silver and gilt. Theeggs, of course, were really cream ice.
Graduallycream ice took the name it has today. One of the earliest advertisements forice cream was put in a New Yorkpaper in 1786. The ad announced that “Ladies and gentlemen may be supplied withice- cream every day at the City Tavern by their humble servant, Joseph Crowe.”But ice cream was still not an everyday event. It was usually presented infancy shapes at the end of dinner parties. Policy Madison (1768—1849) was famous for herimaginative dinners, and she was the first to serve ice cream at the WhiteHouse. When her guests came into the dining room, they found a table coveredwith delicious dishes, and in the center of the table, a huge mound of pink icecream on a silver platter.
Icecream was such a delicacy because it was so hard to make. At first it wasbeaten and then shaken by hand in a pan of salt and ice until it became firm. Afreezer that was cranked by hand was developed around 1846. Making ice creamwas still a chore, but cranking the freezer was much easier and faster thanshaking the mixture in a pan.
“Icecream socials” became a popular way to entertain friends. Everyone helped turnthe crank of the freezer, and homemade peach or strawberry ice cream was thereward. The development of the continuous freezer in the 1920’smade the manufacture of ice cream very quick and economical. It soon was easierto buy packaged ice cream than to make it at home. Eskimo pies and popsiclesbegan to be sold at the same time.
Possiblyice cream cones began with the World’s Fair in 1893. Vendors there sold FriedIce Cream. The ice cream was covered with a fritter batter and then quicklydipped in very hot lard or olive oil. Putting the ice cream in an alreadyprepared cone was the next step. Today there are many novelty products, fromfrozen drumsticks to ice cream pies.
16.According to the passage, which of thefollowing served ice cream disguised as eggs?
A. Policy Madison
B. Joseph Crowe
C. Louis XIV
D. Marco Polo
17.Newspaper advertisements for ice cream first appeared in_________.
A.1846
B.1893
C.1768
D.1786
18.The text would most probably be found in_________.
A. a history book
B. anadvertisement
C. a cookingbook
D. an encyclopedia
19. The main purpose of the writer is to_________.
A. explain how ice cream was invented
B. tell us the history of ice cream
C. describe why ice cream is so popular
D. persuade us the difficulties involved inmaking ice cream
20.Ice cream was so delicious, the reason is that_________.
A. it was difficult tomake
B. it was easy to make
C. it was beaten andthen shaken
D. it was complicated tomake