1 . Almost everyone has heard the expression “the calm before the storm.” It is usually used to describe a peaceful period just before a very stressful situation or a tense argument.
British sailors coined the phrase in the late 1600s; they noted that before certain storms the seas would seem to become still and the winds would drop.
Science has given us the reason. According to US website HowStuffWorks, a calm period occurs because many storms, tornadoes and hurricanes draw in all the warm and humid(湿热的) air from the surrounding area. As this air rises into the storm clouds, it cools and acts as “fuel for the storm, like petrol in a car”. Once the storm has taken all the energy it can from the air, it is pushed out from the top of the storm clouds and falls back down to ground level. As the air goes down, it becomes warm and dry. Warm and dry air is stable, so once it covers an area, it causes a calm period before the storm. This same process also causes the “eye of the storm” in hurricanes and tornadoes. In these conditions, the calm occurs in the center of the storm because of the strong rotating (旋转的) winds.
The Weather Network has a tip for working out how far away a storm is. First count how many seconds there are between a flash of lightning and a clap of thunder, roughly three seconds equal one kilometer. So, for example, if you count nine seconds, the storm is about three kilometers away. A good method is that if your count is below 30 seconds, you should seek shelter straight away.
However, due to the complexity of storm system, not all storms take place after calm. Given the right conditions, some storms announce themselves with heavy rain and fierce winds.
So, your best bet is to keep yourself updated with weather reports for any predictions regarding a coming storm in your area. That's the most reliable way to predict the next display(展示) of nature's temper (脾气).
1. What is the function of Paragraph 3?| A．To describe how the eye of the storm comes into being. |
| B．To stress why tornadoes and hurricanes are destructive. |
| C．To explain why a peaceful period occurs before some storms. |
| D．To remind how dangerous a storm can be in certain situations. |
| A．one kilometer away | B．three kilometers away |
| C．four kilometers away | D．five kilometers away |
| A．Heavy storms don't usually last long. |
| B．It is not always quiet before a storm. |
| C．Storms have a big influence on our life. |
| D．Weather reports often fail to predict a storm. |
| A．A travel journal. | B．A science fiction. |
| C．A literature review. | D．A geography magazine. |
2 . The expression“a thirst for knowledge" may soon have a new meaning for millions of people who have no way to get clean water. Researchers have developed a book with specially treated pages that can turn dirty water into clean and drinkable water. They say their invention could improve the lives of many in the developing world.
About 700 million people around the world are at risk of disease or even death because their drinking water is not clean. The water is polluted by harmful bacteria.
The book contains 25 pages. Each page is about one millimeter thick. The pages contain very small particles (微粒) of silver. The pages can be used as filters（过滤器）to remove harmful microorganisms(微生物) that can pollute drinking water. The filter kills the organisms that pass through it.
Pictures on the pages show the dangers of dirty water and how to use the book for those unable to read. The pages are made of filter paper. They are designed to be torn from the book. Water can be poured through the paper to be cleaned.
Ms. Dankovich, the inventor, says each page can treat up to 100 liters of water. She recently presented her invention at the meeting of the American Chemical Society in Boston, Massachusetts. She was asked whether she had considered adding classic literature on the book's pages.
"The idea of classic texts—that's of interest maybe later. We have discussed a little bit more exciting text. But we really haven't had the time to go through that part," she says.
Teri Dankovich and another researcher tested the drinkable book in Bangladesh, Ghana and South Africa. The tests proved to be successful.
Water for Life, a non-governmental organization, has provided financial support for the project.
1. What do we learn about the book from the text?| A．It has pages with several functions. | B．It is about environment protection. |
| C．It sells well around the world. | D．It can treat about 100 liters of water. |
| A．Classic texts. | B．Exciting discussion. |
| C．Invention presentation. | D．Financial support. |
| A．Ghana | B．Bangladesh. |
| C．South Africa. | D．America. |
| A．Researchers have found a way to save those being ill. |
| B．Book pages could provide safe drinking water. |
| C．Knowledge is as important as drinkable water. |
| D．Millions of people are in great need of drinkable water. |
3 . The health and welfare of every person in America will be affected by global warming, especially children, the elderly and the poor, according to a new White House science report.
The report said every region (地区) of the country will suffer worse health from heat waves and drought. All but a handful of states would have worse air quality and flooding. It predicts an increase in diseases spread by tainted (腐烂的) food, bad water and bugs (臭虫).
The report concludes that climate change causes real risk to human health and human system that supports the way of life in the United States.
Man-made global warming is caused by greenhouse gases from the burning of fossil fuels. At current emission (放射) levels, global temperatures are likely to rise by about 2 degrees by midcentury and about 7.5 degrees by the end of the century.
The most vulnerable (脆弱的) Americans — the poor, elderly, sick, very young and immigrants — will suffer more. That’s at least 10 percent of the country’s population, probably more. It will be tougher for these people to get enough health care for climate-related illnesses, to cool down in heat waves, to escape extreme events such as Hurricane Katrina, and even to get enough food.
While every region of America is vulnerable to global warming’s health and welfare effects, more people are moving to coastal regions, which are most vulnerable to climate change because of drought and hurricanes.
1. According to the report, we learn all of the following will risk human’s health EXCEPT ______.| A．increase in the number of bugs |
| B．reduction in carbon dioxide emissions |
| C．global warming and climate change |
| D．heat waves and drought |
| A．All of states would suffer flooding. |
| B．About half of all states would have clear air. |
| C．Flooding would occur in almost all the states. |
| D．Air quality in few states is not high. |
| A．Global temperatures are increasing year by year because of carbon dioxide. |
| B．Global warming is caused by human beings. |
| C．It is wise for the Americans to move into coastal regions. |
| D．At least one tenth of Americans are more likely to suffer climate-related illnesses. |
| A．explain how the phenomenon of global warming forms |
| B．provide evidence that global warming and climate change risk human’s health |
| C．warn every American of the danger of global warming to their health |
| D．protect the vulnerable Americans from suffering from diseases |
1.对生活造成的影响；
2.建议采取的措施。
要求：1.词数100左右；
2.开头已给出，不计入总词数。
参考词汇：零霾smog
Recently smog has occurred in many areas of China, _____________________________________________
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