题目内容
The air crash that happened in Russia is really a ________ (悲剧).
提示：
tragedy
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七彩题卡口算应用一点通系列答案At Dallas/Fort Worth Airport, the lights are controlled by sensors that measure sunlight. They dim immediately when it’s sunny and brighten when a passing cloud blocks the sun.
A wall of windows at a University of Pennsylvania engineering building has built-in blinds (百叶窗) controlled by a computer program that follows the sun’s path. Buildings are getting smarter and the next generation of building materials is expected to do even more.
Windows could catch the sun’s energy to heat water. Sensors that measure the carbon dioxide breathed out by people in a room could determine whether the air conditioning needs to be turned up.
Many new materials and technology have been designed in the last 15 years. They are now being used in a wave of buildings designed to save as much energy as possible. They include old ideas, like “green roofs”, where a belt of plants on a roof helps the building keep heat in winter and stay cool in summer, and new ideas, like special coating for windows that lets light in, but keeps heat out.
As technologies such as sensors become cheaper, their uses spread.
The elevators at Seven World Trade Center, which is under construction in New York, use a system that groups people traveling to nearby floors into the same elevator, thus saving elevator stops. People who work in the building will enter it by swiping (刷) ID cards that will tell the elevators their floor, readouts will then tell them which elevator to use. The building also has windows with a coating that blocks heat while letting in light.
More new building materials and technology are in development. A Philadelphia building firm is now working on “smart wrap” that uses tiny solar collectors to catch the sun’s energy and transmitters (传输器) as wide as a human hair to move it. They are expected to change the face of the construction industry in the next ten years or so.
【小题1】________ will be developed and used in the construction industry.
| A．“Green roofs” that cool or heat buildings |
| B．“Smart wrap” that catches the sun’s energy |
| C．Sunlight-measuring sensors that control lights |
| D．Window coating that lets light in, but keeps heat out |
| A．send people to floors with fewer stops |
| B．teach people how to use their ID cards |
| C．make people stay very cool in summer |
| D．help people go traveling in the building |
| A．a human hair | B．smart wrap | C．the sun’s energy | D．a transmitter |
| A．Buildings Are Becoming Smarter |
| B．Buildings Are Getting More Sunlight |
| C．Buildings Are Lacking in Much Energy |
| D．Buildings Are Using Cheaper Materials |
The devastation caused by Hurricane Katrina is a wake-up call. It is a call for every American to pay attention to the destruction we risk by allowing human-induced(导致的) climate change to continue. It is impossible to prove that Hurricane Katrina was caused by global warming, or even that human activities made the storm more severe. However, a paper published in the scholarly journal Nature reports that the force of dangerous hurricanes has increased by 50% during the last 50 years. It also reports that a global warming-induced rise in temperature near the ocean’s surface has probably contributed to this increase in dangerous storms, and thus to property(财产) damage and human death.
On August 30, the Los Angeles Times summed up(总结) the view of many scientists who agree that if the frequency of hurricanes does not decrease in the next few years, then we will be fairly certain that humans, and not natural storm cycle, are at the root of the problem. I believe there is at least a chance that by reducing U.S. reliance on fossil fuels for energy, we can prevent future tragedies like Hurricane Katrina. Let the change begin now.
There are many ways to reduce the volume of greenhouse gas emissions. My family drives the most fuel-efficient car we can afford, but I prefer to take public transportation whenever possible. My family buys locally grown food instead of produce that was transported thousands of miles on fuel-burning vehicles. We also replaced our incandescent light bulbs（白炽灯泡）with more energy-efficient compact fluorescents（荧光灯）. This might sound like a trivial move, but the Union of Concerned Scientists reports that if every household in the United States replaced one incandescent bulb with a compact fluorescent, it would have the same effect on U.S. carbon-dioxide emissions as removing 7.5 million cars from the roads. Now think if every household replaced not just one but all of their incandescent bulbs!
The United States, with just five percent of the world’s population, is responsible for close to one quarter of greenhouse gas emissions worldwide, yet our country is doing far less than most European nations to fight global warming. We don’t have to sacrifice our lifestyles; Europeans enjoy the same standards of living as Americans. So what are we waiting for? It is time to act.
【小题1】 Which of the following is a fact?
| A．Hurricane Katrina was caused by global warming. |
| B．Human activities made the storm more severe. |
| C．The force of dangerous hurricanes has increased by 50 percent during the last 50 years. |
| D．A global rise in temperature near the ocean’s surface accounts for more dangerous storms. |
| A．it might be human activities that lead to global warming. |
| B．natural storm cycles have caused global warming. |
| C．hurricanes are likely to come more frequently. |
| D．burning fossil fuels for energy is a better alternative. |
| A．it would have the same effect as removing 7.5 million cars from the roads. |
| B．it would save 7.5 million tons of carbon-dioxide from going into the air. |
| C．this would reduce the total output of CO?emissions in huge amounts. |
| D．cars will be much more environmentally friendly. |
| A．Europe does a better job. |
| B．Europe should follow the example of America. |
| C．he, as an European, wants to see more efforts made by Americans. |
| D．Europeans should shoulder a greater responsibility. |
Many people like the feeling of the gentle wind in spring. Many like to see the falling leaves dancing in the wind in autumn. But sometimes, when the wind becomes a storm, it can be very destructive (毁灭性的).
A series of such storms struck the US last month and caused very serious damage and human pain.
Every year, major storms cause many problems around the world. There is nothing people can do to stop these powerful forces of nature. But new techniques are helping scientists to predict how, when, and where big storms will happen. The more exact scientists’ warnings are, the better people can prepare for the storms.
Predictions are improving. “We’ve gotten better over the years, especially the last few years,” says Phil Klotzback, a scientist at an American university. How is a storm formed? Even if scientists know where a storm will happen, winds can suddenly change, carrying the storm to a new direction. “For a hurricane to happen, conditions have to be just right,” Klotzback says.
First, the ocean water needs to be warm enough so that it evaporates and rises into the air. As it rises, the air containing drops of water cools and turns back into liquid. This process gives off heat. This produces energy like an engine that causes winds to increase. It drives the formation of a hurricane.
If wind speeds reach 40 miles per hour, the system is called a “ tropical storm”, and it gets a name. At 75 miles per hour, it becomes a hurricane. Hurricanes that hit the US start when a thunderstorm forms off the coast Africa. Storms also develop over tropical waters in other parts of the world.
On average, 60 or 70 storms form off Africa every year. About 10 of them get names. There are usually about six hurricanes. Two tend to be very big, with winds of 115 miles per hour or a bit higher.
The hurricane season lasts from June to November. Ninety percent of all hurricanes hit in August, September and October.
【小题1】According to the text, hurricanes usually ________.
| A．form off the coast of Africa and America |
| B．hit parts of the world in summer and autumn |
| C．cause sea winds to rise and blow over the sea |
| D．strike the US but cause no damage |
| A．begins to move | B．gets lost | C．becomes hot | D．changes into a gas |
a. The ocean water evaporates and goes into the air.
b. Heat creates energy and causes winds to increase.
c. The vapor cools.
d. The ocean water is warm enough.
e. The vapor changes back into liquid.
f. This course gives out heat.
| A．a, d, e, b, c, f | B．a, b, c, f, d, e | C．d, a, c, e, f, b | D．d, a, b, c, e, f |
“I Went Skydiving at 84!”
As a young girl growing up in the 1930s, I always wanted to fly a plane, but back then it was almost unheard of for a woman to do that. I got a taste of that dream in 2001,when my husband arranged for me to ride in a hot air balloon for my birthday. But the experience turned out to be very dull. Around that time, I told my husband that I wanted to skydive. So when our retirement community（社区）announced that they were having an essay competition and the topic was an experience of a lifetime that you wanted to have, I decided to write about my dream.
In the essay, I wrote about my desire to skydive, stating George Brush Sr. did it at age 80. Why not me? I was just 84 and in pretty good health. A year went by and I heard nothing. But then at a community party in late April 2009, they announced that I was one of the winners. I just couldn’t believe it. Inspired by this， I decided to realize my dream, even though some of my family members and my doctor were against it.
On June 11, 2009, nearly 40 of my family and friends gathered in the area close to where I would land while I headed up in the airplane. My instructor, Jay, guided me through the experience. The plane was the noisiest one I had ever been in, but I wasn’t frightened—I was really just looking forward to the experience. When we reached 13,000 feet, Jay instructed me to throw myself out of the plane. When we first hit the air, the wind was so strong that I could hardly breathe. For a second I thought, “What have I gotten myself into?” But then everything got calmer. We were in a free fall for about a minute before Jay opened the parachute（降落伞）, then we just floated downward for about five minutes. Being up in the clouds and looking at the view below was unlike anything I have ever felt—much better than the hot air balloon. I was just enjoying it.
Skydiving was really one of the greatest experiences of my life. I hope other people will look at me and realize that you don’t stop living just because you are 84 years old. If there’s something you want to experience, look into it. If it’s something that is possible, make it happen.
【小题1】What happened to the author in 2001?
| A．She flew an airplane | B．She entered a competition |
| C．She went on a hot air balloon ride | D．She moved into a retirement community |
| A．build up her own reputation | B．show her admiration for him |
| C．compare their health condition | D．make her argument persuasive |
| A．Excited | B．Scared | C．Nervous | D．Regretful |
| A．The beautiful clouds | B．The wonderful view |
| C．The company of Jay | D．The one-minute free fall |
| A．doctor | B．conductor | C．pilot | D．trainer |