【正文】 n springing up like mushrooms .The smoke and harmful chemicals released from factories also pollute the environment ). To solve the problem is not easy at all ,but is worthying .We should do something 專業(yè)好文 檔 16 such as (planting more trees , equipping cars with pollutioncontrol devices and learning to recycling natural resources )to improve the present situation ,and i do believe everything will be better in the future . 作文的開頭 一篇文章通?？煞譃槿齻€部分，即開頭、正文和結(jié)尾。 文章的開頭一般來說應(yīng)盡量做到開門見山，用簡單明白的敘述引出文章的話題，使讀者了解文章要談?wù)撌裁?，一下于引起讀者的興趣。如 “How I Spent My Vacation”(我怎樣度假 )的開頭是： I Spent my last vacation happily． 下面是題為 Honesty(談?wù)\實 )一文中的開頭： Honesty is one of the best virtues． An honest man is always trusted and respected． On the contrary, one who tells lies is regarded as a liar， and is looked upon by honest people． 2．交代人物、事情、時間或環(huán)境開頭 在文章的開頭，先把人物、事件和環(huán)境交待清楚。例如 A Trip to the Taishan Mountain(泰山游 )的開頭是： I remember my first trip to the Taishan Mountain as if it were yesterday. 4．概括性的開頭 即對要在文章中敘述的人或事先作一個概括性的介紹。如 “An Accident”(一場事故 )的開頭是 : It was a rainy and windy morning. The sky was gloomy, the temperature was low, and the street was nearly empty. I was on my way back to school. Suddenly, a speeding car came round the corner. 6．交待 寫作目的的開頭。如 Pollution Control (控制污染 )的開頭： In this article I shall draw your attention to the subject of pollution control. 專業(yè)好文 檔 18 Editor39。s first satellite Sputnik. I also missed watching Neil Armstrong step foot on the moon and the first space shuttle take off for the stars. Those events were way before my time. As a kid, I was fascinated with what goes on in the sky, and when NASA pulled the plug on the shuttle program I was heartbroken. Yet the privatized space race has renewed my childhood dreams to reach for the stars. As a meteorologist, I39。d hear my foot tapping rapidly under my desk. I39。s like the set for a Gee Lucas movie floating to the edge of space. You and I will have the chance to watch a man take a leap into an unimaginable free fall from the edge of space live. The (lack of) air up there Watch man jump from 96,000 feet Tuesday, I sat at work glued to the live stream of the Red Bull Stratos Mission. I watched the balloons positioned at different altitudes in the sky to test the winds, knowing that if they would just line up in a vertical straight line we would be go for launch. I feel this mission was created for me because I am also a journalist and a photographer, but above all I live for taking a leap of faith the feeling of pushing the envelope into uncharted territory. The guy who is going to do this, Felix Baumgartner, must have that same feeling, at a level I will never reach. However, it did not stop me from feeling his pain when a gust of swirling wind kicked up and twisted the partially filled balloon that would take him to the upper end of our atmosphere. As soon as the 40acre balloon, with skin no thicker than a dry cleaning bag, scraped the ground I knew it was over. How claustrophobia almost grounded supersonic skydiver With each twist, you could see the wrinkles of disappointment on the face of the current record holder and cap (capsule munications), Col. Joe Kittinger. He hung his head low in mission control as he told Baumgartner the disappointing news: Mission aborted. The supersonic descent could happen as early as Sunday. 專業(yè)好文 檔 19 The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause), he can expect a lot of turbulence. The balloon will slowly drift to the edge of space at 120,000 feet ( miles/ kilometers). Here, Fearless Felix will unclip. He will roll back the door. Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters). In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds. Even if everything goes as planned, it won39。d miss this.