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海口模拟)下列财经新闻中，可以用右图中由Q1点到Q2点运动来正确描述、解释的是( )   A. 由于部分游资进入农产品行业炒作大蒜，引起大蒜价格上涨 B. 某日报报道，空心菜每500克售价从2元上涨到3. 5元；城市周边菜农纷纷抢种空心菜 C. 商务部表示，4月中旬以来全国生猪及猪肉价格恢复性上涨，且涨幅有扩大趋势 D. 工信部报告，2010年第一季度我国钢材需求旺盛，钢材价格上涨   We are all called upon to make a speech at some point in life, but most of us don’t do a very good job. This article gives some suggestions on how to give an effective speech. So, you have to give a speech-- and you’re terrified. You get nervous, you forget what you want to say, you stumble over words, you talk too long, and you bore your audience. Later you think, “Thank goodness, it’s over. I’m just no good at public speaking. I hope I never have to do that again. ” Cheer up! It doesn’t have to be that bad. Here are some simple steps to take the pain out of speech making. Ask yourself the purpose of your speech. What is the occasion? Why are you speaking? Then, gather as many facts as you can on your subject. Spend plenty of time doing your research. Then spend plenty of time organizing your material so that your speech is clear and easy to follow. Use as many examples as possible, and use pictures, charts, and graphs if they will help you make your points more clearly. Never forget your audience. Don’t talk over their heads, and don’t talk down to them. Treat your audience with respect. They will appreciate your thoughtfulness. Just remember: be prepared. Know your subject, your audience, and the occasion. Be brief. Say what you have to say and then stop. And be yourself. Let your personality come through so that you make person-to -person contact with your audience. If you follow these simple steps, you’ll see that you don’t have to be afraid of public speaking. In fact, you may find the experience so enjoyable that you volunteer to make more speeches! You’re not convinced yet? Give it a try and see what happens. 　　1. The main idea of this article is _________. 　　A. you can improve your speaking ability 　　B. a poor speaker can never change 　　C. how to give an effective speech     2. Paragraph 2 implies that ________. 　　A. many people are afraid of giving a speech 　　B. many people are happy to give a speech 　　C. many people do not prepare for a speech 　　3. The phrase “talk over their heads” means ________. 　　A. speak too loudly 　　B. look at the ceiling 　　C. look down upon them 　　4. All of the following statements are true except that ___________. 　　A. few people know how to make good speeches 　　B. a lecturer does not need to organize his speech 　　C. research is important in preparing a speech 　　5. The title for this passage may be _______. 　　A. Do Not Make a Long Speech 　　B. How to Give a Good Speech 　　C. How to Prepare for a Speech