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x2-arccosx的导数是()。
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微分方程y"-6y'+9y=0在初始条件y'|x=0=2，y|x=0=0下的特解为()。
Storytellers told tales of heroes to provide positive examples, the legends that held the tribe together and provided its identity, and the stories of foolish or evil beings to remind young and old the penalties for not living correctly. Even behavior. too horrible to speak of directly, such as cannibalism, cowardice or death, could be examined through the mediation of a story.
Even today, books, magazines, radio, television and movies still have not replaced the storyteller. None of these permanent, reproducible media are able to deliver a personal, individualized message with the impact of a well-told story.
Whether the purpose of a story is to set a mood, to entertain, to teach a lesson, to amuse or to scare, nothing works like a good story at the right moment. A story with an obvious message concerning the results of another person's misbehavior. can deliver a wanting and deterrent that a direct confrontation can not produce and the story will do so without hurting egos. A positive relationship can be maintained and, sometimes, even strengthened while still delivering an unwelcome message. This is the power of the storyteller.
Not every story will fit every situation. The story teller needs to select a story which will meet the needs of the situation and then the story teller must tailor the story to fit the time available, the age of the audience, the location and the mood desired. A good story choice will capture the interest of the audience. Audience members will relate to a location, experience or emotion that they share in con-anon with the story teller and will suspend disbelief long enough to be drawn into the story as it unfolds. Good stories build to a climax with a beginning, a middle and an end. The elements of the story revealed in each section will lead to the next Predicaments and solutions will depend on the details of the story revealed in an earlier section. However, better stories may add a twist, to make the ending unexpected and, therefore, more interesting.
Scary stories should be matched to the audience audience. A little feeling of fright as the story is told may be beneficial in learning how to deal with scary things, but the use of lingering fear that is carried away from the story is simply terrorizing a susceptible person and helps no one. It is the responsibility of the story teller to determine what is appropriate and not to abuse the audience's good faith.
Stories can come from nearly anywhere. Folk tales, myths, legends, history (especially local history), Indian stories, adventure yarns and other storytellers are all sources of inspiration. A short listing of collected stories is appended along with several examples of good stories. However, the best sources of stories for good story tellers are their own experiences.
When inspiration and opportunity unite, a story is ready to be born. No matter what the source, the best stories are those of which the story teller has some personal experience or knowledge. This can be combined with other sources and a little practice to produce the tale to be told When personal experience is the base on which a story is built, the story will" ring true" to the audience and have a greater vitality. A dislike of insects crawling on your skin, an encounter with a wild animal or the memory of a weird noise experienced when you were home alone can each provide the experience or feeling that will form. the basis of a story. The experience need only be a wee part of the story, but that can be enough.
When you have chosen a sourc
抛物线y2=6x及直线x=2围成图形绕x轴旋转一周形成立体的体积为()。
SECTION C NEWS BROADCAST
Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. At the end of each news item, you will be given 10 seconds to answer the questions.
听力原文： Voice One: This is what scientists say the sun sounds like—the equivalent of a solar heartbeat. Solar scientists used listening devices to unravel some of the mysteries of Earth's nearest star. It's not the actual sound. Sound can't travel through the vacuum of space. But [this is] a recreation based on the waves recorded by the devices.
Each pitch corresponds with the movement and vibrations of various hot gasses as they flow like rivers beneath the sun's surface—similar to how trade winds blow on Earth.
Scientists translate the sounds they make into images. This allows a unique glimpse inside the gun's complex architecture, to answer questions about its temperature, chemical makeup, and how gasses inside ebb and flow.
Voice Two: What we're finding is that there are very interesting structures inside. There's an equatorial belt of faster moving material. And then, farther up near the poles, we believe that there's a jet stream of material moving about 60 miles an hour up at a very north latitude.
How do the scientists measure the pitch？
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