Originally constructed around 256 BCE by the State of Qin
During the Warring States period, people who lived along the banks of the Min River
The Honghe Hani Rice Terraces(梯田), in southern Yunnan, China, cover a huge 16, 603-hectare area. The terraces,
In 2003, the terraced fields were
The landscape changes through the year. In April the terraces are all green as rice starts to grow; in later parts of the year it is yellowish brown as the rice ripens. In February, the terraces become bare earth, with the water reflecting(反射)the sky.
The Xi’an City Wall is the most complete city wall that has survived China’s long history. It
We accessed the wall through the South Gate. The wall is 12 meters high and from here you can see streams of people moving inside and outside the City Wall.
After
We
4 . Coal burning deep underground in China，India and Indonesia is threatening the environment and human life, scientists have warned. These large-scale underground fires cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can even bring about forest fires, a panel（专门小组）of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. They warned the resulting release of poisonous elements like arsenic （砷）and mercury（汞）can also pollute local water sources and soils “Coal fires are a global disaster,” said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, U.S.A. But surprisingly few people know about them.
Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to disappear and under the right combinations of sunlight and oxygen, can trigger spontaneous（自然产生的）catching fire and burning. This can occur underground in coal stockpiles（煤堆）, abandoned mines or even as coal is transported. Such fires in China destroy up to 200 million tons of coal per year, delegates were told. In comparison, the U. S. economy consumes about one billion tons of coal annually, said Stracher, whose analysis of the likely effect of coal fires has been accepted for publication in the International journal of Coal Ecology. Once underway, coal fires can burn for decades, even centuries. In the process, they release large volumes of greenhouse gases, poisonous fumes and black particles into the atmosphere.
The members of the panel discussed the effect these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to detect(发现). One of the members of the panel, Assistant Professor Paul Van Dijk of the International Institute for Geo-Information Science and Earth Observation in the Netherlands, has been working with the Chinese government to detect and monitor fires in the northern regions of the country.
The remote sensing and other techniques will allow scientists to estimate how much carbon dioxide these fires are emitting. One suggested method of controlling the fires was presented by Gary Colaizzi, of the engineering firm Goodson, which has developed a beat-resistant grout designed to be pumped into the coal fire to cut off the oxygen supply.
1. According to Paragraph 2, what will happen when the underground heat does not disappear? ________.| A．Coal heats up on its own and catches fire and burns. |
| B．The underground oxygen will be used up. |
| C．Poisonous fumes and greenhouse gases will be accumulated underground. |
| D．There will be an increase of abandoned mines. |
| A．Annual consumption of coal in US. |
| B．Annual consumption of coal in China. |
| C．How long coal fires have lasted in the northern region of China. |
| D．Coal fires may have an effect on the environment. |
| A．He was one of the scientists who have warned against the threats of underground fires. |
| B．He has detected and monitored underground fires in the Netherlands. |
| C．He has worked with the Chinese government on the underground fires issue. |
| D．He works for a research institute in the Netherlands. |
| A．Using remote sensing technique. |
| B．Controlling the release of carbon dioxide. |
| C．Cutting off the oxygen supply. |
| D．Making the soil heat resistant. |
5 . The United States has a vast network of National Parks spread all around the country. Here are some National Parks for you.
Arches National Park, Utah
More than 2,000 natural stone arches make Arches National Park a special place in Utah. Travelers from around the world come to see brilliant sunsets that light up the sky each night. Hikers and rock climbers will love the endless options for exploring, while more low-key visitors are sure to love the camping.
Acadia, Maine
Super close to Bar Harbor, one of Maine's most beloved tiny towns, Acadia National Park tops travel guides for the Vacation State. Before making your way to Mt. Desert island, dine on the country's most famous fish and lake advantage of the opportunity to go whale watching on the Atlantic Ocean. When visiting Acadia, set aside some time to hike and go boating.
Mount Rainier, Washington
We couldn't leave the park with you slowly moving ice off the list. Washington's Mount Rainier National Park, found southeast of Seattle, has 25 of them (along with the famous volcano) as its attention-catching sight. The National Park says it's "the snowiest place on earth where snow is measured regularly." If snowcapped peaks aren't your thing, plan to visit the park when the weather is warmer.
Great Sand Dunes (沙丘), Colorado
You probably imagine the Rocky Mountains when you think about Colorado, but did you know that the Centennial state is also home to the United States' largest sand dunes? See them for yourself at Great Sand Dunes National Park, where you can go sand boarding or "fat biking". Though June temperatures are said to be some of Southern Colorado's best, a warm winter day can be an equally enjoyable time to see the dunes.
1. What do Arches National Park and Acadia have in common?| A．Tourists can hike in the parks. | B．They are located in tiny towns. |
| C．Both of the parks offer sea food. | D．They offer free guide to travellers. |
| A．Sunsets. | B．Whales. |
| C．Ice. | D．Sands. |
| A．Arches National Park, Utah | B．Acadia, Maine |
| C．Mount Rainier, Washington | D．Great Sand Dunes, Colorado |
