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[主观题]

Section A Scientists scanning and mapping the Giza pyramids say they&39;ve discovered th

Section A

Scientists scanning and mapping the Giza pyramids say they&39;ve discovered that the Great Pyramid of Giza is not exactly even. But really not by much. This pyramid is the oldest of the world‘s Seven Wonders. The pyramid’s exact size has (26) puzzled experts for centuries, as the “more than 21 acres of hard, white casing stones” that originally covered it were (27) removed long ago.

Reporting in the most recent issue of the newsletter “AERAGRAM,” which (28) chronicles the work of the Ancient Egypt Research Associates, engineer Glen Dash says that by using a new measuring approach that involved finding any surviving (29) remnants of the casing in order to determine where the original edge was. They found the east side of the pyramid to be a (30)maximum of 5.55 inches shorter than the west side.

The question that most (31) fascinates him, however, isn&39;t how the Egyptians who designed and built the pyramid got it wrong 4,500 years ago, but how they got it so close to (32) perfect. “We can only speculate as to how the Egyptians could have laid out these lines with such (33) precision using only the tools they had,”Dash writes. He says his (34) hypothesis is that the Egyptians laid out their design on a grid, noting that the great pyramid is oriented only (35) slightly away from the cardinal directions (its north-south axis runs 3 minutes 54 seconds west of due north, while its east-west axis runs 3 minutes 51 seconds north of due east)—an amount that&39;s “tiny, but similar,” Atlas Obscura points out.

A)chronicles

B)complete

C)established

D)fascinates

E)hypothesis

F)maximum

G)momentum

H)mysteriously

I)perfect

J)precision

K)puzzled

L)remnants

M)removed

N)revelations

O)slightly

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更多“Section A Scientists scanning and mapping the Giza pyramids say they&39;ve discovered th”相关的问题

第1题

Section ADirections: In this section, there is a passage with ten blanks. You are required

Section A

Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item with a single line through the center. You may not use any of the words in the bank more than once.

Air Pollution refers to the addition of harmful substances to the atmosphere resulting in damage to the environment, human health, and【S1】______of life. One of many forms of pollution, air pollution occurs inside homes, schools, and offices; in cities; across continents; and even【S2】______. Air pollution makes people sick—it causes breathing problems and【S3】______cancer—and it harms plants, animals, and the ecosystems (生态系统) in which they live. Some air pollutants return to earth in the form. of acid rain and snow, which destroy【S4】______and buildings, damage crops and forests, and make lakes and streams【S5】______for fish and other plant and animal life.

Pollution is changing Earth's atmosphere so that it lets in more harmful radiation from the Sun. At the same time, our polluted atmosphere is becoming a better insulator (绝缘体), which can【S6】______heat from escaping back into space and lead to a rise in global average temperatures. Scientists【S7】______that the temperature increase, referred to as global warming, will affect world food supply, alter sea level, make weather more【S8】______, and increase the spread of tropical disease.

Although the effects of future【S9】______change are unknown, some report that exaggerated weather conditions may【S10】______affect agriculture, for example, it may lead to severe drought and sharply decreasing agricultural yields in parts of Africa.

A) globally B) promotes C) predict D) unsuitable

E) science F) dramatically G) protect H) prevent

I) quality J) climate K) statues L) significant

M) powerful N) moderately O) extreme

【S1】

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第2题

Section BDirections:In this section, you are going to read a passage with ten statements

Section B

Directions:In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2.

Countries Rush for Upper Hand in Antarctica

A) On a glacier-filled island with fjords(峡湾)and elephant seals, Russia has built Antarctica’s first Orthodox church on a bill overlooking its research base. Less than an hour away by snowmobile. Chinese laborers have updated the Great Wall Station, a vital part of China’s plan to operate five basses on Antarctica, complete with an indoor badminton court and sleeping quarters for 150 people. Not to be outdone, India’s futuristic new Bharathi base, built on stills(桩子)using 134 interlocking shipping containers, resembles a spaceship. Turkey and Iran have announced plans to build bases, too.

B) More than a century has passed since explorers raced to plant their flags at the bottom of the world, and for decades to come this continent is supposed to be protected as a scientific preserve, shielded from intrusions like military activities and mining . But an array of countries are rushing to assert greater influence here, with an eye not just towards the day those protective treaties expire, but also for the strategic and commercial that already exist.

C) The newer players are stepping into what they view as a treasure house of resources. Some of the ventures focus on the Antarctic resources that are already up for grabs, like abundant sea life. South Korea, which operates state-of–the-art bases here, is increasing its fishing of krill(磷虾),found in abundance in the Southern Ocean, while Russia recently frustrated efforts to create one of the world’s largest ocean sanctuaries here.

D) Some scientists are examining the potential for harvesting icebergs form. Antarctica, which is estimated to have the biggest reserves of fresh water on the planet. Nations are also pressing ahead with space research and satellite projects to expand their global navigation abilities.

E) Building on a Soviet-era foothold, Russia is expanding its monitoring stations for Glonass, its version of the Global Positioning System(GPS). At least three Russian stations are already operating in Antarctica, part of its effort to challenge the dominance of the American GPS, and new stations are planned for sites like the Russian base, in the shadow of the Orthodox Church of the Holy Trinity.

F) Elsewhere in Antarctica, Russian researchers boast of their recent discovery of a freshwater reserve the size of Lake Ontario after drilling through miles of solid ice. “You can see that we’re here to stay,” said Vladimir Cheberdak, 57, chief of the Bellingshausen Station, as he sipped tea under a portrait of Fabian Gottlieb von Bellingshausen, a high-ranking officer in the Imperial Russian Navy who explored the Antarctic coast in 1820.

G) Antarctica’s mineral, oil and gas wealth are a longer-term prize. The treaty banning mining here, shielding coveted(令人垂诞的)reserves of iron ore, coal and chromium, comes up for review in 2048. Researchers recently found kimberlite(金伯利岩) deposits hinting at the existence of diamonds. And while assessments vary widely, geologists estimate that Antarctica holds at least 36 billion barrels of oil and natural gas.

H) Beyond the Antarctic treaties, huge obstacles persist to tapping these resources, like drifting icebergs that could jeopardize offshore platforms. Then there is Antarctic’s remoteness, with some mineral deposits found in windswept locations on a continent that is larger the Europe and where winter temperatures hover around minus 55 degrees Celsius.

I) But advances in technology might make Antarctica a lot more accessible three decades from now. And even before then, scholars warn, the demand for resources in an energy-hungry world could raise pressure to renegotiate Antarctica’s treaties, possibly allowing more commercial endeavours here well before the prohibitions against them expire. The research stations on King George lsland offer a glimpse into the long game on this ice-blanketed continent as nations assert themselves, eroding the sway long held by countries like the United States, Britain. Australia and New Zealand.

J) Being stationed in Antarctica involves adapting to life on the planet’s driest, windiest and coldest continent, yet each nation manages to make itself at home. Bearded Russian priests offer regular services at the Orthodox church for the 16 or so Russian speakers who spend the winter at the base, largely polar scientists in fields like glaciology and meteorology. Their number climbs to about 40 in the warmer summer months. China has arguably the fastest growing operations in Antarctica. It opened its fourth station last year and is pressing ahead with plans to build a fifth. It is building its second ice-breaking ship and setting up research drilling operations on an ice dome 13,422 feet above sea level that is one the planet’s coldest places. Chinese officials say the expansion in Antarctica prioritises scientific research. But they also acknowledge that concerns about “resource security” influence their moves.

K) China’s newly renovated Great Wall Station on King George lsland makes the Russian and Chilean bases here seem outdated. ”We do weather monitoring here and other research.” Ning Xu, 53, the chief of the Chinese base, said over tea during a fierce blizzard(暴风雪) in late November. The large base he leads resembles a snowed-in college campus on holiday break, with the capacity to sleep more than 10 times the 13 people who were staying on through the Antarctic winter. Yong Yu, a Chinese microbiologist, showed off the spacious building, with empty desks under an illustrated timeline detailing the rapid growth of China’s Antarctic operations since the 1980s “We now feel equipped to grow,” he said.

L) As some countries expand operations in Antarctica, the United States maintains three year-round stations on the continent with more than 1,000 people during the southern hemisphere’s summer, including those at the Amundsen Scott station, built in 1956 at an elevation of 9,301 feet on a plateau at the South Pole. But US researchers quietly complain about budget restraints and having far fewer icebreakers the Russia, limiting the reach of the United States in Antarctica.

M) Scholars warn that Antarctica’s political drift could blur the distinction between military and civilian activities long before the continent’s treaties come up for renegotiation, especially in parts of Antarctica that are ideal for intercepting(拦截) signals from satellites or retasking satellite systems, potentially enhancing global electronic intelligence operations.

N) Some countries have had a hard time here, Brazil opened a research station in 1984, but it was largely destroyed by a fire that killed two members of the navy in 2012, the same year that a diesel-laden Brazilian barge sank near the base. As if that were not enough. a Brazilian C-130 Hercules military transport plane has remained stranded near the runway of Chile’s air base here since it crash-landed in 2014.

O) However, Brazil’s stretch of misfortune has created opportunities for China, with a Chinese company winning the $100 million contract in 2015 to rebuild the Brazilian station.

P) Amid all the changes, Antarctica maintains its allure. South Korea opened its second Antarctic research base in 2014, describing it as a way to test robots developed by Korean researchers for use in extreme conditions. With Russia’s help, Belarus is preparing to build this first Antarctic base. Colombia said this year that it planned to join other South American nations with bases in Antarctica.

Q) “The old days of the Antarctic being dominated by the interests and wishes of white men from European. Australasian and North American states are over.” Said Klaus Dodds, a politics scholar at the University of London who specialises in Antarctica. “The reality is that Antarctica is geopolitically contested.”

36. According to Chinese officials, their activities in Antarctica lay greater emphasis on scientific research.

37. Efforts to create one of the world’s largest ocean sanctuaries failed because of Russia’s obstruction.

38. With several monitoring stations operating in Antarctica, Russia is trying hard to counter America’s dominance in the field of worldwide navigational facilities.

39. According to geologists’ estimates. Antarctica has enormous reserves of oil and natural gas.

40. It is estimated that Antarctica boasts of the richest reserves of fresh water on earth.

41. The demand for energy resources may compel renegotiation of Antarctica’s treaties before their expiration.

42. Many countries are racing against each other to increase their business and strategic influence on Antarctica.

43. Antarctica’s harsh natural conditions constitute huge obstacles to the exploitation of its resources.

44. With competition from many countries, Antarctica is no longer dominated by the traditional white nations.

45. American scientists complain about lack of sufficient money and equipment for their expansion in Antarctica.

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第3题

Acid RainWhat Is Acid Rain?"Acid rain" is a broad term used to describe several ways that

Acid Rain

What Is Acid Rain?

"Acid rain" is a broad term used to describe several ways that acids fall out of the atmosphere. A more precise term is acid deposition, which has two parts: wet and dry.

Wet deposition refers to acidic rain, fog, and snow. As this acidic water flows over and through the ground, it affects a variety of plants and animals. The strength of the effects depends on many factors, including how acidic the water is, the chemistry and buffering (隔离) capacity of the soils involved, and the types offish, trees, and other living things that rely on the water.

Dry deposition refers to acidic gases and particles. About half of the acidity in the atmosphere falls back to earth through dry deposition. The wind blows these acidic particles and gases onto buildings, cars, homes, and trees. Dry-deposited gases and particles can also be washed from trees and other surfaces by rainstorms. When that happens, the runoff water adds those acres to the acid rain, making the combination more acidic than the falling rain alone.

How Do We Measure Acid Rain?

Acid rain is measured using a scale called "pH". The lower a substance's pH, the more acidic it is. Pure water has a pH of 7.0. Normal rain is slightly acidic because carbon dioxide dissolves into it, so it has a pH of about 5.5. As of the year 2000, the most acidic rain falling in the U.S. has a pH of about 4.3. Effects of Acid Rain

Acid rain causes acidification (酸化) of lakes and streams and contributes to damage of trees at high elevations (for example, red spruce trees above 2,000 feet) and many sensitive forest soils. In addition, acid rain accelerates the decay of building materials and paints, including irreplaceable buildings, statues, and sculptures that are part of our nation's cultural heritage. Prior to failing to the Earth, SO2 and NOx gases and their particulate matter derivatives, sulfates and nitrates contribute to visibility degradation and harm public health.

What Society Can Do About Deposition?

There are several ways to reduce acid deposition, ranging from societal changes to individual action.

•Understand Acid Deposition's Causes and Effects

To understand acid deposition's causes and effects and track changes in the environment, scientists from EPA, state governments, and academies study acidification processes. They collect air and water samples and measure them for various characteristics like pH and chemical composition, and they research the effects of acid deposition on human-made materials such as marble and bronze. Finally, scientists work to understand the effects of sulfur dioxide (SO2) and nitrogen oxides (NOx)—the pollutants that cause acid deposition and fine particles—on human health.

To solve the acid rain problem, people need to understand how acid rain causes damage to the environment. They also need to understand what changes could be made to the air pollution sources that cause the problem. The answers to these questions help leaders make better decisions about how to control air pollution and therefore how to reduce—or even eliminate—acid rain. Since there are many solutions to the acid rain problem, leaders have a choice of which options or combinations of options arc best. The next section describes some of the steps that can be taken to reduce, or even eliminate, the acid deposition problem.

•Clean Up Smokestacks (烟囱) and Exhaust Pipes

Almost all of the electricity that powers modem life comes from burning fossil fuels like

coal, natural gas, and oil. Acid deposition is caused by two pollutants that are released into the atmosphere, or emitted, when these fuels are burned: sulfur dioxide (SO2) and nitrogen oxides (NOx).

Coal accounts for most U.S. sulfur dioxide (SO2) emissions and a large portion of NOx emissions. Su

A.Y

B.N

C.NG

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第4题

What is scientists' attitude towards the future of Chad Lake?A.Pessimism.B.Hopeful.C.Indif

What is scientists' attitude towards the future of Chad Lake?

A.Pessimism.

B.Hopeful.

C.Indifferent.

D.Doubtful.

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第5题

Scientists are interested in the effect of forestry on native animals.A.YB.NC.NG

Scientists are interested in the effect of forestry on native animals.

A.Y

B.N

C.NG

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第6题

Scientists have made a __________ in their combat against the AIDS.A.breakupB.breakdownC.b

Scientists have made a __________ in their combat against the AIDS.

A.breakup

B.breakdown

C.breakthrough

D.breakout

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第7题

Scientists believe that uranium was absorbed by the Earth when it was formed.A.YB.NC.NG

Scientists believe that uranium was absorbed by the Earth when it was formed.

A.Y

B.N

C.NG

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第8题

Many of the scientists and engineers are judged____________(根据其成就的大小)

Many of the scientists and engineers are judged____________(根据其成就的大小)

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第9题

Scientists use SM046 as an example to show that ______.

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第10题

A.They both attract scientists' attention.B.They can both be quite challenging.C.They

A.They both attract scientists' attention.

B.They can both be quite challenging.

C.They are both thought-provoking.

D.They may lead to surprising findings.

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