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Which of the following statements is NOT true according to the passage？
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Dong Xuhui, director of the sandstorm research group under the administration, said the sandstorm that invaded Beijing this week was the most severe since the group began conduction sandstorm research in 1995. "In some sandstorms in the Inner Mongolia Autonomous Region, visibility had been lowered to less than 1 meter," Dong said.
The administration's satellite sandstorm supervision system showed that sand and dust drifted at about 2,500 to 3,500 meters above the ground, affecting Beijing for 51 consecutive hours. "The sand and dust particles in the air are relatively small, so they could easily invade people's breathing systems." Dong said, "So it is better to stay indoor in such weather."
Unfortunately, there are no effective ways to stop or decrease the frequency of sandstorms in the near future. Gao Jixi, a researcher with the China Environmental Science Institute, suggested that the government address that the overall problem as part of its environmental protection policy.
Though protective forests in North China are expected to grow soon, Gao said that drifting sands at high altitudes could still invade most cities. "We should consider the environment in northern and western China as a whole when adopting related environmental protection policies," Gao suggested.
He said governments in the relevant provinces and autonomous regions should speed up their industrial restructuring and firmly put a stop to industrial practices that harm the environment. Gao said some hasty tree planting activities should also be stopped because many of tree species have now been found not to match the local soil. "Planting more trees does not mean the improvement of the environment," he said.
Gao was invited to present an environmental report to premier Zhu last year. Gao had advocated the building of a large ecological system in northern and western China to resist sandstorm.
He objected to environmental stress caused by humans interfering with nature. "We should respect nature's rules by restoring the original ecological systems in those regions." Gao said. Following that principle would be the best way to fight sandstorms, he added.
What's the main idea of this article？
What could be expected as a result of Jenny's efforts？
Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D . Mark your answers on ANSWER SHEET 1.
El Nino is the term used for the period when sea surface temperatures are above normal off the South American coast along the equatorial Pacific, sometimes called the Earth's heartbeat, and is a dramatic but mysterious climate system that periodically rages across the Pacific.
El Nino means "the little boy" or "the Christ child" in Spanish, and is so called because its warm current is felt along coastal Peru and Ecuador around Christmas. But the local warming is just part of an intricate set of changes in the ocean and atmosphere across the tropical Pacific, which covers a third of the Earth's circumference. Its intensity is such that it affects temperatures, storm tracks and rainfall around the world.
Droughts in Africa and Australia tropical storms in the Pacific, torrential rains along the Californian coast and the Peruvian deserts have all been ascribed to the whim of El Nino.
This at least is the theory, and it has worked pretty well over the past century, with El Nino occurring about every three to five years and La Nina in between. But there have been some baffling developments in recent years. For one thing, El Nino has returned three times in the past four years. For another, since 1976 El Nino has dominated relative to the cooler phase (La Nina). There has been only one significant La Nina, but five El Ninos, including an extremely severe one in 1982—1983 that caused damage costing 8 billion dollars. Moreover a huge pool of warm water has settled down near the dateline in the central Pacific.
Yet it is important to understand the changes if scientists are to be able to forecast the climatic effects of El Ninos with any degree of accuracy. This is not just an academic task— accurate forecasts can spell out feast or famine in many tropical countries around the world. Forecasting efforts have focused on El Nino, whose effects are generally more severe than those of La Nina.
A worrying possibility is that the changes maybe due to greenhouse warming. If so, the recent fluctuations may be an early glimpse of worse things to come.
When does El Nino happen？
Which of the following statements about the sandstorm is NOT true according to this article？
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