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第一篇：初中三分钟演讲稿
尊敬的老师、亲爱的同学们：
大家好！今天我演讲的题目是“勇气”
何谓勇气？勇气就是在合适的时间，用自己的胆识把一件事情办对、办好。所以“勇气”不但要有“勇”，还要有“气”。“勇”象征着能做出这件事的胆识，“气”象征着把这件事办对办好的能力。有“勇”无“气”，终归是一介莽夫，成不了大事;有“气“无”勇“，只能籍籍无名，成了有“勇”又有“气”之人的垫脚石。
那什么才是有“勇”又有“气”的人呢？
汉武帝刘彻，十六岁登基，执掌大汉江山五十四年，成就了汉朝的鼎盛。他有“勇“。分布“推恩令”，敢于向父兄一辈的诸侯王们挑战;亦有“气”，广纳贤才，改革货币、北拒匈奴，成为了中国历史上的明君之一。
我国“两弹一星”元勋钱学森，为中国军事发展立下赫赫战功。他有“勇”， 在新中国成立之时放弃美国的高官厚禄，只身来到百废待兴的新中国;亦有“气”，不但为人高风亮节，而在发射场事必躬亲，最终成就了新中国在这一领域达到世界领先的水平。
也许同学们可能会问了：以上两位都是震古烁今的伟人，我们怎么会成为这样的人？我的回答是：不！或许我们做不成这些大事，但“勇气”的磨炼定然要从小事开始。对老师提出一个对班级有益的意义，为被难题困扰的同学解答问题，在楼道的门口用扫把把积雪扫到一边，它们都包含了“胆识”和“能力”两个方面。如果在平常的小事中不断历练自己的勇气，等到你遇到 了做大事的机遇，那些你积累的小勇气就会厚积薄发，变为大事的成功。到时候，或许名垂青史就不再是个梦想！
那么就让我们行动起来吧！用自己的能力，证明自己是个有胆识、有能力的人―当然，从小勇气转化为大勇气是一个蜕变的过程。希望几十年后，今天的我们，也会变成一群有勇气的人！
我的演讲到此结束，谢谢大家！
第二篇：初中三分钟英语演讲稿
Good morning, ladies and gentlemen, I’m very glad to make a speech here. Today my topic is “I love you, China.”
Since the day I was born, I began to have a proud name―Chinese. Since the day I began to talk, the most beautiful sentence I’ve ever learnt has been “I love you, China!”
I love you, China, and I’m so proud of being a Chinese. I’m proud that I’ve got the beautiful yellow skin, black eyes and black hair. I’m also proud that I speak the most beautiful language in the world―Chinese.
I love you, China, for I can feel the deep love you give me every day, every minute. Last year, I got an opportunity to visit the United States of America. During my staying there, my father’s boss once invited my family to dinner. While at , he looked at me and asked: “Little boy, how long have you been in America?” “About a month,” I answered, “How lucky you are!” he said, “If you were living in China, how could you learn such perfect English?” I smiled and told him proudly that all the students in China are able to learn English at school. I saw his surprised eyes and said to myself, “I’m proud of you, China ”
第三篇：初中三分钟英语演讲稿
At first, you must understand the meaning of climate change. It means any long-term significant change in the average weather, which may include average temperature, precipitation, wind patterns and so on. For example, Australia is experiencing rapid climate change. Since the middle of the twentieth century, Australian temperatures have risen by about average one temperature degree with an increase in the frequency of heat waves and a decrease in the numbers of frosts and cold days. Rainfall patterns have also changed, which means that the northwest has seen an increase in rainfall over the last fifty years while much of eastern Australia and the far southwest have experienced a decline. From this example, it indicates climate change that is occurring today has sped up, and affects long-term weather. The Earth’s climate is largely affected by how much heat is stored in the atmosphere. Furthermore, the climate change is caused by dynamic process on Earth, external forces including variations in sunlight intensity, and more recently by human activities.
The most important reason of climate change is caused by humans, because humans produce a lot of carbon dioxide into the air. This carbon dioxide emits from fossil fuel, aerosols, cement manufacture, land use, animal agriculture and deforestation. For example, trees can take in carbon dioxide to produce oxygen by photosynthesis. If people cut many trees for making furniture, paper, or sell wood to make money, there is much more carbon dioxide in the air. Beginning with the industrial revolution in the nineteenth century and accelerating ever since, the human consumption of fossil fuels has raised carbon dioxide levels rapidly. It means that carbon dioxide levels are substantially higher now than before. On the other hand, during the procedure of manufacturing cement, which is used in buildings, significantly more carbon dioxide is produced. While people improve their living standard, they cause climate change. When people burn coal, oil, and gas for our electricity, carbon dioxide is produced. When people burn fossil fuel to move vehicles, carbon dioxide is also produced. These sorts of examples indicate that humans are the real culprit. They do not consider the consequence, while they enjoy producing every thing they want.
It is not just man-made pollution of the atmosphere which can cause climate change. Changes in the amount of carbon dioxide in the air have occurred naturally during the history of the Earth, leading to climate changes. When a volcano erupts, it releases huge amounts of carbon dioxide and sulfur dioxide into the atmosphere. However, volcano eruptions cannot effect climate change. The main reason is that before the volcano erupts, it would release huge amount of carbon dioxide and sulfur dioxide for a very long time. This pollution injected into the air blocks out a lot of sunlight. Therefore, it can cause the Earth to cool over fewer years. For example, in April 1991 eruption of Mount Pinatoba, where is in the Philippine islands, emitted huge amounts of carbon dioxide and sulfur dioxide into the air. The movement of the Earth’s axis also affects climate change; it moves a little more than a half-degree each century. Other processes can change the Earth’s climate over millions of years. When not only continents move around the world, but also mountains ranges are built, the changing patterns of landmasses affect the way the heat in the atmosphere and in the oceans is stored. In addition, changes in the way ocean water circulates around the world can affect the climate, because the oceans store even more heat than the atmosphere. Once ocean currents change direction, slow down, or reverse, it has a significant impact on climate.
Climate change is mainly caused by carbon dioxide. This can be separated to two important parts: natural causes, and human causes. After we realise what the two important factors of climate change are, and what the climate change is, we could try to think of a more effective solution to solve the climate change problem to make a higher quality environment.