题型:阅读理解 题类:模拟题 难易度:普通
河南省洛阳市2018届高三英语第三次统考试卷
Mexico sites on an island plateau (高原) surrounded by volcanic peaks, which makes air quality a constant concern for people who live there.
In April, the country took a decisive step toward improving air quality by enacting a temporary ban on private and Federal vehicles in the city. The rule forbids people from driving in the city one day each week and one Saturday each month. Electric vehicles, government service vehicles, public transport options and school buses are not included in the ban.
Mexico City isn't the first urban center to be involved in car-free living. But the ban is more than an awareness-raiser. It was enacted with the direct aim of solving air pollution. In March, the city sank into a deep brown haze of smog when the pollution levels passed the 200 mark. The city ordered some 1.1m of the area's 4.7m cars off the streets and also offered free bus and subway rides.
Mexico City's temporary vehicle ban raises questions about the best ways to improve urban air quality. India, whose citizens breathe some of the world's dirtiest air, has tried a variety of solutions. Earlier this year, the Indian government started a 4% sales tax on new-car purchases.
Beijing also has experience with cleaning the air. The city introduced alternate-day rules in advance of the 2008 Olympic Games, which produced good results. And then there is the London congestion (拥挤) charge, introduced in 2003. The charge has had a measurable effect on air quality.
For now, Mexico City — named by the United Nations as the most polluted city on the planet in 1992 — can look forward to the start of the region's rainy season, when daily showers will help lo clean the air.
Jaya, Topan, and Kasarna, the Sumatran tigers Those tiger cubs were born on January 2, 2015, at Chester Zoo in England. There are only 300 to 400 left in the wild, which places these felines on the critically endangered list. Most of their natural jungle habitat (栖息地) has been destroyed, and they are common targets for poachers(偷猎者). Found in the forests on the Indonesian island of Sumatra, the tiger is the smallest of big cat species. |
African painted dog pups Pictured at three months old, these African painted puppies were born at the Port Lympne Reserve in Kent, England. Originally from South Africa, the species are natural hunters and live in packs of 20-30 members. Scientists estimate their population size around 3,000 to 5,500. They are targets of human killings, and are easily harmed by disease and habitat destruction, placing them on the endangered list. |
Pancake, the cheetah Pancake was born on February 28, 2015, at Wildlife Safari in Winston, Oregon. When she was six weeks old, a pup named Dayo arrived at the zoo to serve as his companion. Cheetahs are naturally shy, so zoos often pair them with dogs to help them overcome their anxiety. Cheetahs are native to eastern and southwestern Africa; fewer than 10,000 felines remain in the wild. |
Asmara, the Sumatran orangutan Asmara was born on November 22, 2014, at the Fort Wayne Children's Zoo in Indiana. These monkeys are endangered in the wild, with fewer than 14,000 left. Agricultural development has ruined their natural forest home. They are hunted, mainly to be kept in homes as status symbols. They live in the trees, almost never touching the ground. |
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