1 . Bees are responsible for one in every three bites of food: from almonds (杏仁) to berries and the alfalfa (苜蓿) that feeds dairy cows. Our diets and agricultural economy hinge on a healthy bee population.
However, rapid declines in bee population around the world put additional stress on an already unstable food supply by depressing yields and agricultural efficiency. While bee biologists do not foresee upcoming food system collapse without honey bees, we do know that agriculture would quickly become unrecognizable—and much more limited.
Farmers are on the frontlines of the economic impacts of bee decline. For example, the cost of almond pollination (授粉) has nearly tripled since colonies began collapsing in 2004, costing that industry over $83 million per year.
The causes behind recent bee declines are not a “mystery”. Independent scientists now largely agree that bee declines are caused by a combination of several factors, including: poor nutrition, habitat loss and pesticide (杀虫剂) exposure.
In the last several years, pesticides — both alone and in combination with other pesticides — have emerged as a key catalyst (催化剂) behind this disturbing phenomenon, both because of their direct toxicity to bees and their indirect and cascading effects.
Scientists know that individual bees can be acutely poisoned while flying through pesticide-contaminated planter dust in a recently planted corn field. More commonly, they are chronically poisoned at sublethal (亚致死) levels by eating and drinking contaminated pollen, nectar and water over time. Bees are then more likely to get sick.
As an indicator species, honey bees are sounding an alarm that we ignore at our peril. Among their lessons: industrial agriculture has gone off the rails. The pesticide treadmill has kicked into high gear with a class of dangerous systemic pesticides—while regulators were asleep at the switch. So let’s keep the heat on decision makers to take meaningful action.
1. What does the underlined phrase in paragraph 1 mean?| A．Cut down. | B．Contribute to. | C．Depend on. | D．Go against. |
| A．The impact of rapid declines in bee population. | B．The role of farmers in agriculture. |
| C．The ignorance of the effect on food system. | D．The cost of almond pollination. |
| A．Poor in nutrition. | B．Economic impacts. |
| C．Loss of habitat. | D．Exposure to pesticides. |
| A．To express sympathy for the affected farmers. | B．To show the factors resulting in the bees’ crisis. |
| C．To explain a key catalyst to the bees’ problem. | D．To urge decision makers to take action for bees. |
2 . Lightning can strike anyplace on Earth. In fact, there are about 6,000 lightning strikes every minute, which is more than 8 million strikes every day. The risk of being struck by lightning is low, but the consequences of lightning strike injuries are serious. Even though your home is a safe shelter during a lightning storm, you might still be at risk. About one-third of lightning-strike injuries occur indoors.
Avoid water.
Do NOT bathe, shower, wash dishes, or have any other contact with water during a thunderstorm.
Do NOT use anything connected to an electrical outlet (电源插座), such as computers, game systems, washers, or stoves. Lightning can travel through electrical systems, radio and television reception systems, and any metal wires or bars in concrete walls or flooring.
Avoid windows, doors, porches, and concrete.
Don’t use corded (有线的) phones.
Corded phones are NOT safe to use during a thunderstorm. Do NOT use them.
Follow the safety measures above can minimize your risk of being injured indoors on lighting days. Don’t take it for granted that only outdoor activities can put you in a dangerous place. Keep it in mind that inappropriate indoor activities can also be disastrous.
| A．Here are some tips to keep safe and reduce your risk of being struck while indoors. |
| B．In addition, follow up on the latest information about the storm. |
| C．However, it is safe to use cordless or mobile phones during a storm. |
| D．Stay away from windows and doors, and stay off porches. |
| E．Some outdoors measures can keep you safe and prevent you from being attacked. |
| F．Lightning can travel through a building’s water pipe system. |
| G．Don’t touch electronic equipment. |
1. What is the conversation mainly about?
| A．Fighting fires. | B．Detecting fires. | C．Using fires. |
| A．Around 50. | B．About 400. | C．Over 8600. |
| A．Size of a car. | B．Size of a plane. | C．Size of a sports field. |
| A．Saving animals. | B．Saving the trees. | C．Saving humans. |
Imperial Mountain Resort in Chengde used to be the resort of emperors of Qing Dynasty. Situated in the city of Chengde in northeastern Hebei Province, the resort is
Surrounded by lakes, forest and mountains, it is China’s
The resort and the 12 Buddhist temples at its periphery (外围) were built during the Qing Dynasty. It served as the second political center of the Qing imperial court
5 . When the Great Backyard Bird Count (GBBC) began last Friday, Steve and Janet Kistler of Hart County, Kentucky, joined in. They’ve done so every year since the now-global tradition began 25 years ago.
For Moira Dalibor, who teaches math at a school, this was the first count. She led a group of students and parents to an arboretum (植物园) for an exercise in data-gathering. They were among hundreds of thousands of people around the world counting and recording over four days. Last year, about 385,000 people from 192 countries took part in the GBBC.
This global data goes into the eBird database used by scientists for research on bird populations, which have declined sharply overall in past decades. It’s part of a rise in “citizen science” projects in which volunteers collect data about the natural world for use by researchers.
Many bird-watchers use eBird year-round, and it has collected huge amounts of data — often between 1 million and 2 million bird checklists a month from around the world in the past couple of years, says Becca Rodomsky-Bish, the project’s leader at the Cornell Lab of Ornithology, in Ithaca, New York. “Observing birds is a good way to connect with the natural world. Birds are everywhere. You don’t have to leave your house. They will come. And they’re charismatic because they’re fun and interesting to watch.”
This is how it works: Participants watch birds, whether that means looking out of the window for 15 minutes or taking a longer trip to a nature area. Organizers recommend the Merlin bird ID app to distinguish birds by size, shape, song or other characteristics. Many participants also carry field guides and binoculars (双筒望远镜) along with their phones. They then enter the findings into the eBird app. Those numbers help researchers track the ups and downs of various species, which then help determine the direction of conservation efforts.
Dalibor prepared her classes with information about local species and practiced with the Merlin app. The kids recorded bird sightings with pencils and drawing boards, and parent volunteers entered those numbers on phones.
1. Why did Dalibor lead her students to an arboretum?| A．To do exercise for health. | B．To observe different plants. |
| C．To practice their math skills. | D．To collect information about birds. |
| A．Attractive. | B．Beautiful. | C．Rare. | D．Shy. |
| A．To record their findings. | B．To identify different birds. |
| C．To help determine the birds’ habitat. | D．To track the ups and downs of various species. |
| A．Great Backyard Bird Count: a strange activity |
| B．Watching birds contributes to students’ education |
| C．Moira Dalibor: a pioneer and responsible teacher |
| D．Great Backyard Bird Count shows power of citizen science |
On the plains of northwest Oklahoma, you can see for miles: nothing but grass, masses of evergreen trees and steep red-rock canyons(峡谷). But with my telescope, I could see the helicopters, one after another clearly, dumping water on a wildfire in the far distance. I wasn’t concerned by the small cloud of smoke snaking skyward. It had to be at least 50 miles away, even across the South Canadian River.
That afternoon, my uncle Larry, my cousin Tony and I had driven to this 4, 000-acre farm for a three-day hunt. I took a few pictures of bushy trees and grand canyons. Then I sent some of them with my cellphone to my wife, Ande, who was 60 miles away. “There’s nothing to worry about. Just have a nice day.” I typed. She had seen the fire on the news and called a few minutes earlier to warn me. Anyway, I didn’t want her to be worried.
The wind had picked up, blowing hard from the southwest. We climbed into the vehicle, with Larry driving, to look for places to hunt the turkeys the next day. We headed north along a small road and stopped here and there to look for signs of turkeys.
We drove for about a mile before Larry turned to head back south, toward the farmhouse. As we did, my eyes went wide. A wall of flames was racing toward us, maybe three quarters of a mile away. “Get us out of here!” I screamed. Larry speeded up the vehicle, bouncing hard along the small road. How had the fire jumped over the river? The flames would be on us in no time. With a fence blocking the way, we jumped out of the vehicle. Then I made a phone call to Ande. “We’re surrounded by fire,” I shouted over the howling wind. “Call 911! We need a helicopter to get us out of here.” The connection went dead.
Paragraph 1:
I looked around, but I couldn’t see Larry and Tony.
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Paragraph 2:
When I woke up, I found myself in a helicopter.
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World Soil Day
As we all know, the
World Soil Day 2022 and its campaign, “Soils: Where food begins”, aims
Soil nutrient loss is a major soil degradation (退化) process threatening nutrition.
Our lives depend
8 . As temperatures soar, electric bills often go through the roof. That’s because people tend to turn on their air conditioners during the long, hot summer months.
It’s been predicted that by 2050 about 75 percent of the world’s homes could have air conditioners. If that’s true, the energy required to cool buildings will double. For that reason, researchers continue to look for solutions to keep air-conditioner usage to a minimum. Some innovations are being used already or are in the process of being developed. Certain building materials can feel cooler because of their ability to absorb heat and release it slowly. Other buildings use water cooling systems to cool them. However, these aren’t the only methods. Science has a few more tricks up its sleeve.
Researchers at Purdue University have developed the world’s whitest paint. This paint can keep a building’s exterior surface cooler than the surrounding temperature. On hot days, walls absorb heat and often become 10 to 20 degrees Celsius hotter than the air around them. But walls painted with Purdue’s white paint reflect 98.1 percent of the heat and send it back into space. This creates a cooling effect.
Purdue professor Xiulin Ruan believes that the super-white paint could have a more powerful cooling effect than many home air conditioners. Researchers hope to have the paint on the market in five to 10 years.
Yi Zheng of Northeastern University has created a “cooling paper”. This material reflects the sun’s rays while pulling heat out of a building’s interior, and the paper can be recycled. He and his team discovered that the paper helps bring down a room’s temperature by about 6 degrees Celsius. Zheng hopes that the cooling paper will someday be used on roofs and within building materials.
Now and in the future, perhaps some of these energy-efficient methods will make it easier to beat the heat.
1. Why does the author mention the air conditioners at the beginning of the passage?| A．To describe a fact. | B．To support an idea. |
| C．To provide examples. | D．To introduce the topic. |
| A．It has been on the market. |
| B．It is the world’s coolest paint. |
| C．Walls painted with it reflect most of the heat. |
| D．It can keep the whole building’s surface cooler. |
| A．The surface of a buildings is better covered with paper. |
| B．Buildings will be built mostly with cooling paper someday. |
| C．The cooling paper will be practical and eco-friendly building materials. |
| D．The cooling paper can bring down a room’s temperature more than air conditioners. |
| A．Purdue’s White Paint: A New Material to Cool Buildings |
| B．Cool Buildings: Innovative Ways to Keep Buildings Cool |
| C．Cool Building Materials: Solutions to Fight against Climate Change |
| D．Future Air Conditioners: New Energy-efficient Methods to Beat the Heat |
9 . Popcorm Park Zoo is not like most zoos. It is a very special place.
This unusual place was not originally a zoo. At first it was called the Forked River Animal Care Center. The workers there looked after lost or unwanted cats and dogs. Today the center is part of the zoo, but now many other kinds of animals are helped there, too.
The changes to the center began in 1977 when a raccoon(浣熊)needed help. One of its front paws(爪子)had been badly hurt. The workers cared for the animal. Finally it was better, but it could not care for itself. The raccoon was allowed to live there. Then a hurt deer was brought there for help. It, too, stayed there after it got well.
Once people heard about the wonderful work being done at the center, they began taking all kinds of hurt or homeless animals there. Soon it was no longer just a home for cats and dogs. So many animals were living there that it became more like a zoo.
Popcorn Park Zoo got its funny name because many of the animals there like to eat popcorn made without oil or salt. The popcorn is sold there to help make money to care for the animals. People buy the popcorn to feed the animals as a treat.
Popcorn Park Zoo now looks after more than 200 kinds of animals. Many of them live freely there. Some of the gentler ones, such as goats, sheep, geese, and deer, walk among the visitors who come to see them. Others are kept in large closed-in areas almost like their natural homes. All the animals there get care and love.
1. Before 1977, the center was a home for .| A．lost or unwanted cats and dogs |
| B．hurt or homeless raccoons and goats |
| C．lost or unwanted deer and sheep |
| D．hurt or homeless raccoons and geese |
| A．They changed its front paws. |
| B．They cured it and let it live there. |
| C．They sent it back to its home. |
| D．They built another home just for it. |
| A．treat the visitors | B．reward the workers |
| C．trick the animals | D．raise money |
| A．They all live in closed-in areas. |
| B．Some of them can walk out of the zoo freely. |
| C．All of them are taken good care of. |
| D．Some of them have already returned to nature. |
10 . “A beautiful field of flowers can be a rather noisy place. It’s just that we can’t hear the sounds.” Scientists at Tel Aviv University have conducted a six-year experiment, proving that plants make noise in certain stressful situations.
Plants produce a high frequency (频率) clicking sound, and when short of water, or damaged, the clicks become far more regular. They also made different sounds, depending on whether they were thirsty or injured. “Each plant and each type of stress is related to a specific sound,” said Professor Lilach Hadany, who led the research study.
Focusing particularly on tomatoes, wheat and corn, the plants were placed in a soundproof(隔音的)room and recorded by microphones. Some plants were starved of water, others cut, and a control group was left undamaged. The researchers used an algorithm (算法) to separate the noises, suecessfully telling the difference between the sounds depending on whether they were dry or cut. The algorithm did this in a greenhouse setting which included far more surrounding sounds, but it was still able to recognize the particular cries for help of the plants.
On average, the human ear can hear sounds up to around 20kHz, while the sounds produced by plants are in the 40-80kHz region, far beyond our hearing. “The sounds made by plants can’t be heard by humans but can probably be heard by various animals, such as bats, mice and insects,” Hadany tells us. Though this has yet to be proven, it’s possible that these creatures use this information to choose which plants to eat.
A study led by Reda Hassanien of China Agriculural University in Beijing years ago, also proved that plants reacted to sound waves, with some plants greatly increasing their yield. While evidence shows that plants can react to sounds, there’s no evidence today that they can actually hear them.
1. What can we know from the six-year experiment?| A．Plants of different types make the sound of the same frequeney. |
| B．Plants produce more regular sound in certain stressful situations. |
| C．Plants make sounds with a much lower frequency when stressed. |
| D．Plants make the sound of the same frequeney whatever the situation. |
| A．To record the sounds. | B．To control the sounds. |
| C．To produce the sounds. | D．To identify the sounds. |
| A．Plants can hear each other’s cry for help. |
| B．Animals can hear the sounds made by plants. |
| C．Plants can make sounds and respond to sound waves. |
| D．Animals decide what to eat based on the sounds plants make. |
| A．Sounds That We Can’t Hear |
| B．Beautiful Songs from Plants |
| C．Plants React to Different Types of Stress |
| D．Plants Talk, Especially When Stressed |
