1 . It’s safe to say Yellowstone National Park is still looking good at the ripe old age of 150. The park, which stretches into Wyoming, Montana, and Idaho, is known for its unique natural scenery, bountiful wildlife, and deep history. It also helped usher (引领) in the broader national park movement in the U.S., according to Chuck Sams, the director of the National Park Service.
“We now celebrate something much bigger than the park itself —the beginning of the national park idea, an idea that spread through the country and around the world, inspiring governments to protect natural and cultural treasures ‘for the benefit and enjoyment of the people,’” he said in a statement.
Yellowstone is home to the largest concentration of mammals in the lower 48 states. Bears, wolves, coyotes, moose, and a large population of small animals can be found in the park. It’s also the only place in the U.S. where bison (野牛) have lived continuously since prehistoric limes. It was looking risky for a period in the 1900s, when die animal was hunted down from a previous high of tens of thousands to less than two dozen. This bison conservation effort continues to this day.
Yellowstone shut its gates in March 2020 due to coronavirus concerns and remained closed for nearly two months. But the park broke attendance records after it reopened. The park reported 4.9 million recreation visits in 2021 — up 28% from 2020 and making it the busiest year on record, July 2021 was die most-visited month in Yellowstone’s history and the first lime visitation exceeded l million visits in a single month. It’s Yellowstone’s natural beauty and deep history that brings millions of visitors each year.
“Yellowstone’s 150th anniversary will be an important moment in time for the world,” said Yellowstone Superintendent Cam Sholly. “It’s an opportunity for us to reflect on the lessons of the old days while focusing our efforts to strengthen Yellowstone and our many partnerships for the future.”
1. What does Paragraph 1 mainly tell us about Yellowstone National Park?| A．Its vast area. | B．Its long history. |
| C．Its significant role. | D．Its fantastic views. |
| A．An increase in the park’s income. | B．A growth in bison population. |
| C．Damage to local ecology. | D．Improvement of species richness. |
| A．Positive. | B．Unclear. | C．Disapproving. | D．Concerned. |
| A．It reminds participants to strive for a shared future. |
| B．It leads people to rethink the idea of the park. |
| C．Its celebration mil take place as scheduled. |
| D．Its past shows long-term conservation efforts count. |
1. 基本情况；
2. 文化特色。
注意：1. 词数100左右；
2. 可以适当增加细节，以使行文连贯；
3. 题目自拟。
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Over the last 100 years, many dinosaur egg fossils(化石)
The egg,
Paleontologists believe it belongs to a toothless dinosaur
Dinosaur embryos are some of the rarest fossils and most of them are incomplete with the bones dislocated. The embryo is preserved
4 . Humans are responsible for 25% to 40% more of the total share of methane emissions(甲烷排放)than previously estimated, according to a new study in Nature.
Methane is one of the most powerful and effective greenhouse gases: about 28 times more effective than carbon dioxide at trapping heat in the atmosphere. It's responsible for about a quarter of global warming. It's produced naturally by animals, volcanoes, and wetlands, but it's also a byproduct of oil and gas production. It's this last form of methane that the study focused on.
Researchers used ice core measurements from Greenland from 1750 to 2013, plus previous data from Antarctica. They melted the ice to let the small quantities of ancient air trapped inside come out. These act a bit like time capsules,allowing us to learn about the methane in the atmosphere at the time. They used carbon-14, which comes from living things, as a substitute(替代物)to determine whether the methane they found came from biological sources. Until 1870, around the time when we started using fossil(化石)fuels, almost all methane came from these sources. After that, there was a rise in methane that didn't have any carbon-14, from ancient fossil sources in which carbon-14 had disappeared. That allowed the researchers to compare natural methane with methane caused by human activity.
If more methane is created by humans, there's an even bigger opportunity to control how much we release. Methane stays in the atmosphere for only a decade(compared with 200 years for carbon dioxide). So efforts to cut methane, which mostly comes from the production and transportation of gas and oil, could bring great benefit right away.
1. Which methane source does the study focus on?| A．Animals. | B．Wetlands. | C．Volcanoes. | D．Fossil fuels. |
| A．Methane comes mainly from animals and wetlands. |
| B．There is more methane than carbon dioxide in the air. |
| C．Fossil fuels have been used about a century and a half. |
| D．Methane will remain permanently in the atmosphere. |
| A．Optimistic. | B．Skeptical. | C．Disappointed. | D．Unconcermed |
| A．Fossil Fuels Cause Global Pollution |
| B．Humans Produce More Methane than We Thought |
| C．Methane Is the Biggest Cause for Global Warming |
| D．Carbon Dioxide Has Less Impact on Climate than Methane |
