A.Harmful substances in the smoke from homes. |
B.Damp chemical gases from factory chimneys. |
C.Smoke from homes mixed with dust in the air. |
D.Mixture of fog, smoke and other waste gases. |
A.Harmful gases rise and fall between layers of cold and warm air. |
B.Smoke and chemical gases build up under a layer of warm air. |
C.Smoke and waste gases remain near the ground as cold air pours in. |
D.Thick smoke and gases blown by the wind pile up above warm air. |
A.Temperature inversion. | B.Solar radiation. |
C.Automobile exhausts. | D.Foggy weather. |
A.A naturalist. | B.A zoo specialist. |
C.A TV reporter. | D.A nurse. |
A.They are gentle and shy. | B.They are long-armed man-eaters |
C.They are good at smile from ear to ear. | D.They are fierce animals. |
A.Many species in the world may die out. |
B.A good example can be followed to preserve wildlife. |
C.Women are encouraged to work for zoos. |
D.Our world is not safe today. |
1. How many natural Christmas trees did Americans buy in 2016?
A.Less than 35 million trees. | B.More than 10 million trees. |
C.More than 24 million trees. | D.Less than 24 million trees. |
A.They are grown once again. | B.They are delivered to a tree farm. |
C.They are safely stored away. | D.They are thrown away. |
A.They are moved to a landfill. | B.They are reused next year. |
C.They are cut into pieces. | D.They are exchanged for real trees. |
A.The electronic toy is unique. | B.The toy is safe for all users. |
C.Plastic toys are of low quality. | D.The toy isn’t environmentally friendly. |
5 . The Human Development Report, published annually since 1990, seeks to
Almost every country in the world has a higher HDI than in 1990, despite the fact that since the 2008 financial crisis the total number of people living in extreme
The greatest threat to HDI in the future, according to the report, is climate change. The way to increase average income in a country is through economic growth, which means increased production and
The only solution, according to the report, is to break the
A.judge | B.investigate | C.assess | D.justify |
A.based | B.focused | C.keen | D.reflected |
A.Unsurprisingly | B.Unwillingly | C.Unfortunately | D.Unexpectedly |
A.mixtures | B.experiments | C.signs | D.variations |
A.cruelty | B.poverty | C.emotion | D.terror |
A.talented | B.disadvantaged | C.determined | D.educated |
A.infected | B.ignored | C.improved | D.impressed |
A.to the extent of | B.on account of | C.for the sake of | D.in terms of |
A.critical | B.proud | C.fond | D.independent |
A.administration | B.consumption | C.application | D.concentration |
A.objects | B.sticks | C.leads | D.turns |
A.threaten | B.maintain | C.concern | D.guarantee |
A.nevertheless | B.however | C.otherwise | D.therefore |
A.link | B.record | C.law | D.gap |
A.fearless | B.needless | C.careless | D.hopeless |
A.Bring flowers. | B.Take a pot plant. |
C.Buy postcards. | D.Send fruits. |
7 . Animal Rights
Every conscious being has interests that should be respected. No being who is conscious of being alive should be devalued to thinghood, dominated, and used as a resource or
Animal rights is about letting animals live on their own terms. It can be written into our laws, but is not an actual list or bill of rights as we have for human society. It begins with our promises not to act like
Why is animal rights
As we do, animals protect their children; they feel fear; they warn each other of dangers; they play. We might differ from other animals in some ways, but that doesn’t give us the right to
Whether we admit it or not, it’s a prejudice to think we are
A.companies | B.goods | C.insects | D.providers |
A.active | B.conscious | C.intelligent | D.strange |
A.Indeed | B.Moreover | C.Nevertheless | D.Otherwise |
A.followers | B.friends | C.masters | D.tutors |
A.necessary | B.reflected | C.respected | D.revolutionary |
A.distinguish | B.keep | C.exploit | D.raise |
A.animal-free | B.eco-friendly | C.low-salt | D.well-balanced |
A.conflict | B.confusion | C.isolation | D.misery |
A.calm | B.chase | C.pull | D.put |
A.signs | B.symbols | C.symptoms | D.performances |
A.differently | B.similarly | C.gently | D.unfairly |
A.abandoned | B.chosen | C.oppressed | D.spoiled |
A.accessible | B.appealing | C.reasonable | D.superior |
A.change | B.dominate | C.persist | D.proceed |
A.contrary to | B.more than | C.owing to | D.rather than |
8 . New archaeological discovers suggest that trade between Europe and Asia along the Silk Road probably began in some form many centuries earlier than once thought. The findings, coupled with a widening range of scientific and historical research, could add a fascinating new page to the epic of the Silk Road.
The latest and most surprising discovery is pieces of silk found in the hair of an Egyptian mummy from about 1000 BC, long before regular traffic on the Silk Road and at least one thousand years before silk was previously thought to be used in Egypt. Other research may extend human activity along this route back even further, perhaps a million years to the migration of human ancestors into eastern Asia.
The official origin of East-West commerce along the road is usually placed in the late 2nd century BC when an agent of the Chinese Emperor Wu-di returned from a dangerous secret mission across the western desert into the remote high country of Central Asia. The agent, Zhang Qian, travelled as far as Afghanistan and brought back knowledge of even more distant lands such as Persia, Syria and a place known as Lijien, perhaps Rome. Historians have called this one of the most important journeys in ancient times. His journey opened the way for what have been thought to be the first indirect contacts between the ancient world’s two superpowers, China and Rome. Chinese silk, first traded to central Asian tribes for war horses and to the Parthians of old Persia in exchange for acrobats and ostrich eggs, was soon finding its way through a network of merchants to the luxury markets of Rome.
But the new discoveries show that Chinese silk was apparently present in the West long before the Han emperor started organized trade over the Silk Road. The research could change thinking about the early history of world trade and provide insights into the mystery of just how and when Europe and the Mediterranean lands first became aware of the glorious culture at the other end of Eurasia.
1. The word “coupled” in the first paragraph could best be replaced by ____________.A.produced | B.doubled |
C.combined | D.contributed |
A.That trade along the Silk Road began earlier than once thought |
B.Historical research often achieves fascinating results |
C.Egyptians had probably travelled to China to buy silk |
D.The new light can now be thrown on ancient trading practices |
A.extended human migration into eastern Asia |
B.primarily benefited the Egyptians |
C.began a million years ago |
D.originated in the 2nd century BC |
A.Because it discovered the Silk Road |
B.Because he helped establish East-West trade |
C.Because he brought back knowledge of Rome to the emperor |
D.Because he travelled as far as Afghanistan |
9 . The koala is an unusual creature. Native to Australia and a bit bigger than a rabbit, it spends most of its time in eucalyptus trees(桉树),feeding on leaves that are poisonous to nearly every other animal on the planet.
The koala sleeps about 22 hours a day and spends the remainder of its time eating and resting. It might spend 10 minutes a day moving, experts say, usually from one tree to another. It has a soft pad at the end of its spine and extra thick fur on its rear end to make the effort, of sitting more comfortable.
Threats and protective measures
The unique lifestyle of the koala has helped it prosper, but today the cute and iconic creature is facing threats from habitat loss, disease and a changing climate. Koala populations are expected to decline by 50 percent in the next 20 years according to the Australian Museum.
To help protect these animals, which bring in an estimated $1.1 billion to Australia each year through koala-related tourism, an international team of researchers has published the first complete genome(基因组)of the koala. Their hope is that the keys to the marsupial’s(有袋动物)long-term survival might be planted in its genetic code.
“The ultimate goal is that we won’t have to…rescue them from the edge of extinction,”said Rebecca Johnson of the Australian Museum Research Institute in Sydney, who led the work.
“Now we have a really good understanding of the koala genome, and we are in a fantastic position to use that knowledge to help us manage them.”
Early findings
An elementary analysis of the koala’s genome, published in Nature Genetics, has already yielded some interesting findings.
For example, the authors found that, compared to other mammals, the koala’s DNA includes an expansion in the number of genes that encode for enzymes involved in anti-poison. That allows them to have a diet that depends almost entirely on eucalyplus leaves which are unusually high in poison. However, it also means that koalas metabolize(代谢)medicines like anti-chlamydia antibiotics faster than other animals.
The koala genome also revealed why koalas are such famously picky eaters. They are known to consume leaves from just 20 of Australia’s 60 known eucalyplus species. And even when they are in one of their preferred trees, koalas take leaf selection very seriously.
Information waiting to be discovered
Johnson said that the information encoded in the koala’s DNA is already being included in management strategies by conservation groups. However, she said the findings described in the new paper represent the early stages of what can be gleamed from the marsupial’s genome.
“The data is public, and I would love for anyone to start mining it and see what other amazing things they can find,”she said.“Once you have a genome of this quality, the sky’s the limit with what you can do with it.”
1. What can be concluded from the passage?A.The research on the Koala’s DNA has prevented its extinction successfully. |
B.Scientists are trying to rescue Koalas by providing more eucalyptus leaves. |
C.Koala’s extinction is being controlled effectively in Australia. |
D.Scientists are trying to find a way based on Koala’s gene to save them. |
A.Koalas can digest poisonous leaves thanks to their gene. |
B.Koalas are particular about leaves because of their taste. |
C.Koalas are being extinct just due to human’s activities. |
D.Koalas will move to other continents in order to survive. |
A.The sky is the restriction |
B.The sky is too high to reach |
C.There is no limit |
D.There is no possibility |
A.Koala-a Special Creature in Australia |
B.scientific research on Koalas |
C.scientific efforts to save the Koalas |
D.Koala’s Characters and Preference |
On the afternoon of 11 March 2011, Tetsu Nozaki watched helplessly as a wall of water
"We strongly oppose any plans to discharge the water into the sea, " Nozaki, head of Fukushima prefecture's federation of fisheries cooperatives, told the Guardian.
Currently, just over one million tonnes of contaminated water is held in almost 1, 000 tanks at Fukushima Daiichi, but the utility has warned that it will run out of space by the summer of 2022.
Seoul, which has yet to lift an import ban on Fukushima seafood
Japanese Government officials say they won't make a decision
Critics say the government is reluctant