The Yellow Crane Tower has
During the Tang Dynasty,many popular poems were written in praise of the Yellow Crane Tower.It was the Yellow Crane Tower poem
The Yellow Crane Tower had different architectural features in different
On top of the tower,visitors are treated to a fantastic view of the Yangtze River,its bridge and the
Enjoying the fame of”The First Scenery under Heaven”，Yellow Crane Tower is one of the most famous towers south of the Yangtze River...
1. What animal is linked with more than one country?
| A．Pandas. | B．Eagles. | C．Bears. |
| A．Russia. | B．Australia. | C．Britain. |
| A．A cat. | B．A dog. | C．A chicken. |
3 . The sixth mass extinction (灭绝) is not a worry for the future. It’s happening now, much faster than expected before, and it’s entirely our fault, according to a study published Monday.
Humans have already wiped out hundreds of species (物种) and pushed many more to the edge (边缘) of extinction through wildlife trade, pollution and habitat loss.
Gerardo Ceballos Gonzalez, a professor of ecology at the National Autonomous University of Mexico, said approximately 173 species died out between 2001 and 2014, which is 25 times more extinct species than you would expect under the normal, background, extinction speed.
The past events were caused by terrible changes of the environment The sixth mass extinction - the one happening now - is different: it’s caused by humans.
When one species in the ecosystem disappears, it destroys the entire ecosystem and pushes other species toward destruction.
Hundreds of species of frogs are suffering population decrease and extinctions because of the chytrid fungus (真菌) disease, which is sometimes spread into new areas by humans. Climate change is likely making it worse.
The researchers said this data highlights the urgency (紧急) with which the world needs to act. Later this year, the UN Convention on Biological Diversity is expected to set new global goals to fight the ongoing biodiversity (生物多样性) problem in the coming decades.
| A．Mass extinctions are just as serious as their name suggests. |
| B．This interdependency (相互依存) of different species is bad news for humans, too. |
| C．But the speed at which species are dying out has quickened up in recent decades. |
| D．We humans are destroying the biodiversity of the world we evolved into. |
| E．Life on Earth has recovered after each of these events. |
| F．The researchers use amphibians (两栖动物) as an example of this phenomena. |
| G．Many species have evolved to deal with climate changes. |
4 . An aquarium(水族馆) that has closed because of the COVID-19 outbreak is asking people to make video calls to the aquarium’s eels(鳗鱼).
The reason? Aquarium workers fear the sensitive creatures may not remember humans’ existence, nor remember that humans do not present a threat. The aquarium has been closed since the start of March. Its sea animals have become used to a largely human free environment during the two-month period of calm. But the aquarium said the situation was having some unexpected effects.
“Creatures in the aquarium don’t see humans except keepers and they have started forgetting about humans,” the aquarium said on its Titter this week, “Garden eels in particular disappear into the sand and hide every time the keepers pass by.” That is causing difficulties for keepers trying to check on the health of the animals. So the aquarium decided to offer an invitation to the public. “Could you show your face to our garden eels from your home?” It is describing the new effort as a “face-showing festival”.
Garden eels are very sensitive by nature. But the 300 garden eels that live in a tank at the aquarium had become used to humans. They rarely hid in the sand from visitors. To try to reintroduce the eels to humans, the aquarium is putting five computers in front of their tank. The public can connect through the Face Time app.
Once the video calls start, people are supposed to show their faces, wave their hands and talk to the eels. But considering the quiet nature of the animals, callers are asked not to shout.
The “face-showing festival” is set to take place Sunday through Tuesday, during Golden Week holiday. It has gotten plenty of support. One Twitter user wrote, “Interesting! When you gaze at the garden eels, they gaze at you. I’m happy to take part.”
1. What does the underlined part in Paragraph 2 indicate?| A．Garden eels seldom disappear into the sand. |
| B．Garden eels are checked regularly by the keepers. |
| C．Humans sometimes present a threat to the aquarium’s animals. |
| D．Humans almost escape from the memory of the aquarium’s animals. |
| A．feel excited at the sight of people | B．tend to hide themselves from people |
| C．have health problems to be solved | D．mostly remain as sensitive as before |
| A．What to do while making video calls. | B．What to do with the eels’ memory. |
| C．How to connect with the eels online. | D．How to show faces during the calls. |
| A．It is going to last a whole week. | B．Many people approve of the activity. |
| C．I’ll make no difference to the creatures. | D．People can make a call through Twitter. |
Elephant seals in funny-looking hats are helping NASA study climate science.
Equipped with specialized sensors that resemble tiny metal hats with antennae(大线），these seals are collecting data that's helping researchers track how heat moves through ocean currents. A team of climate scientists led by Lia Siegelman used this clever technique to track changes in temperature as the seal swam the icy waters of the Antarctic.
With the help of one particularly female seal,the researchers discovered that heat stored at the ocean's depths can sometimes get swirled(打旋）back up to the surface thanks to some deeply penetrating(穿透）currents.While researchers have known that these currents can ferry heat downward into the ocean's interior(内部），the new findings suggest the opposite is true as well-driving a process that can warm the sea's surface as well.
Siegelman thinks it's important to include this new information into existing climate models.Before seals entered the picture,scientists had a pretty limited view of what went on beneath the surface of the Southern Ocean.Here,temperatures can suddenly fall below－1℃,and thick sheets of sea ice block instruments from collecting data.All in all,it's a pretty unappealing area for underwater field work.
But none of that troubles southern elephant seals,which spend nine to ten months of each year at sea,swimming thousands of miles and diving up to half a mile beneath the ocean surface-usually about 80 times a day.
So Siegelman and her colleagues tagged a female elephant seal on the Kerguelen Islands.The researchers followed her 3,000-mile journey,during which she dived 6,333 times."Even when they sleep,they dive,"Siegelman said.“They float down like a leaf."
Combined with satellite images,the wealth of data the seal recovered gave Siegelman and her team a clearer picture than they'd ever been afforded before.It's probably safe to say that the significance of this was lost on the seal.But from the human perspective(观点），it's clear seals are filling in some massive gaps in knowledge.
1. How did the researchers collect climate data in the Antarctic?| A．By testing a high-tech hat. |
| B．By studying a seal's behavior. |
| C．By measuring the water temperature. |
| D．By attaching a sensor to a seal's head. |
| A．ocean currents can drive heat up to the surface |
| B．heat can be taken down into the ocean's interior |
| C．the warm temperatures can help seals dive deep |
| D．the world's waters can balance global warming |
| A．the scenery is unattractive |
| B．the sea floor is changeable |
| C．seals are aggressive hunters |
| D．seals are extraordinary divers |
| A．Seals help us observe the unknown world. |
| B．Satellites are used to track human activities. |
| C．The ocean presents a more beautiful picture. |
| D．Data are analyzed for better survival of seals. |
Peter heard his little sister Eva’s weak cries as Mother wrapped her in a heavy blanket. Peter’s parents would be heading to town soon to take Eva to the doctor. “Remember to keep the stove going,” Father said, “And check on the cow now and then in the barn (畜棚). Her calf (小牛) may come at any time.” “I will,” said
Peter. Peter promised as his parents walked out into the cold. He didn’t want to add to their worry.
“Today I must manage on my own,” Peter said out loud to make himself feel braver. Father often said they all had to pull their own weight (尽本分) in their new home on the farm. Peter hoped he could do that.
The tiny one-room house felt big with only him in it. He carefully added one piece of wood to the small iron stove.
The morning passed quickly as Peter worked on the sled he was making. After eating at noon, he took melted-snow water to the cow. In the afternoon, Peter heard the winds increase. He decided he’d better check on the cow again.
Peter put on his heavy woolen coat and stepped out of the door. The wind blew snow crystals into his face and his breath froze into a patch (小片) of ice on his scarf before he arrived.
Lying on the dirt floor was a newborn calf, on whose tiny body ice had already begun forming. The cow mooed (哞哞叫) and licked her newborn. Peter knew this calf was important to his family. But the calf looked weak, shivering on the ground. “I have to get the calf to the house or it’ll freeze to death,” Peter thought.
Para. 1: He tried to lift it, but it was too heavy.
________________________________________________________________________________________________________________________________________________________________________________________
Para. 2: “I need to fetch some milk for it,” Peter said to himself.
________________________________________________________________________________________________________________________________________________________________________________________
7 . New research suggests that dogs might be able to help save diseased citrus trees.
A group of scientists trained dogs to use their sense of smell to detect a crop disease called citrus-greening. The disease has affected orange, lemon and grapefruit trees in the American states of Florida, California and Texas.
The dogs can detect the disease weeks to years before it appears on tree leaves and roots, the researchers report. A study on their findings was published recently in the Proceedings of the National Academy of Sciences. The report says using dogs is also faster, less costly and more exact than having people collect hundreds of leaves for lab analysis.
Timothy Gottwald is a researcher with the U. S. Department of Agriculture and a co-writer of the study. He told The Associated Press,” This technology is thousands of years old-the dog's nose. We've just trained dogs to hunt new prey. ”
Citrus-greening is caused by a bacteria (细菌) that is spread by a tiny insect that feeds on the leaves and stems of citrus trees. Once a tree is infected(感染), there is no cure. The disease has also hurt citrus crops in Central and South America and Asia. In one experiment involving grapefruit trees in Texas, trained dogs were correct 95 percent of the time in telling the difference between newly infected trees and healthy ones. ”The earlier you detect a disease, the better chance you have at stopping an epidemic(流行病）by removing infected trees, ”Gottwald said.
Matteo Garbelotto studies plants at the University of California, Berkeley. He says the new research shows that dogs can detect an infection well before current methods. Garbelotto has been involved in similar research but had no part in the new study.
Laura Sims is a plant scientist with Louisiana Tech University. She praised the steps taken to find out if the dogs were detecting the bacteria itself or a plant's reaction to an infection. To do that, the researchers infected different kinds of unrelated plants with the bacteria in a laboratory. The dogs were still able to pick out the infected plants.
Gottwald said, “You've seen dogs working in airports, detecting drugs and explosives. Maybe soon you will see them working on more farms. ”
1. According to the research, trained dogs can| A．help infected trees recover from diseases |
| B．recognize a crop disease in its early stage |
| C．cause fruit trees to grow faster than usual |
| D．reduce the cost of planting some fruit trees |
| A．Infected plants. | B．Fruit trees. | C．Tiny insects. | D．Favourite foods. |
| A．To further prove the findings. | B．To explore the plant diseases. |
| C．To present different opinions. | D．To discover a plant's reactions. |
| A．Doubtful. | B．Confident. | C．Uninterested. | D．Curious. |
| A．Sunny. | B．Snowy. | C．Windy. |
9 . We have two dogs. We took in both after they were abandoned (抛弃) in the country. They will run off at any chance.
This morning as I was walking the first one out, the second ran past me quickly. I called for her to return, but she chose to
Anyway, when I drove to pick up my daughter from school I just
“
“Well, partly it’s the money. It will be probably over $100
I noticed that my daughter had her head turned away from me and had not said a
“Why does this
My daughter said, “Dad, you just don’t
Then I
As we
Children are such incredible teachers!
1.| A．As though | B．In case | C．Now that | D．Even though |
| A．recovering | B．removing | C．representing | D．relieving |
| A．consider | B．accept | C．ignore | D．grasp |
| A．efforts | B．devotions | C．memories | D．indications |
| A．happened | B．hesitated | C．occurred | D．attempted |
| A．barking | B．running | C．rolling | D．missing |
| A．money | B．fines | C．bill | D．debts |
| A．So what | B．Why not | C．How about | D．Since when |
| A．after | B．since | C．before | D．until |
| A．sad | B．angry | C．worried | D．embarrassed |
| A．suggested | B．realized | C．promised | D．insisted |
| A．simple | B．slight | C．single | D．suitable |
| A．shock | B．excite | C．upset | D．confuse |
| A．interrupt | B．mistake | C．help | D．understand |
| A．even | B．ever | C．just | D．only |
| A．reminded | B．remembered | C．found | D．sensed |
| A．way | B．home | C．reason | D．time |
| A．destroyed | B．picked | C．raised | D．fed |
| A．mind | B．feeling | C．heart | D．head |
| A．broke into | B．pulled into | C．looked into | D．ran into |
Have you ever heard thunder during a big snowstorm? If so, you’ve experienced an
The things necessary for thundersnow are so uncommon
Thundersnow-when thunder and lightning occur during a snowstorm-is most likely
Patrick Market from University of Missouri, says that heavy snowfall is common during thundersnow. In a 30-year study of snowstorms
Thundersnow is most common in the Midwest, the Great Lakes and along coasts
