There is a great need for a topic or content for a scientific presentation 20

How to rejuvenate --- discussed through Einstein's theory of relativity.

A speech, also known as a speech, is a transcript of a speech delivered at a more solemn ceremony and in certain public places. The speech is the basis for the speech, the specification and hint of the content and form of the speech, and it reflects the purpose and means of the speech, and the content and form of the speech. Speech is a style that people often use in their work and social life.

It can be used to exchange thoughts and feelings, and to express ideas and opinions; It can also be used to introduce one's own study, work situation and experience ......Wait a minute; Speeches have the functions of publicity, encouragement, education, and appreciation, and they can convey the speaker's views, propositions, thoughts, and feelings to the audience and readers, so that they can be convinced and resonate with their thoughts and feelings.

There is a big difference between a speech and a performance or an essay. First of all, speech is a social activity (not an artistic performance) in which the speaker (a real person with a certain social role, not an actor) directly expresses his opinion on a certain meaningful thing or issue that people are generally concerned about, and directly expresses his opinion (not an artistic performance) in front of the audience (not the audience of the first artistic performance) through oral language. Secondly, the composition is the one-sided output of information from the author to the reader through the article, and the speech is the two-way exchange of information between the speaker and the audience on the spot.

Strictly speaking, speech is a triangular information exchange between the speaker and the audience, the audience and the audience, and the speaker cannot be satisfied with conveying his thoughts and emotions and emotions, he must be able to control the response and communication between himself and the audience, the audience and the audience.

1. Dear teachers and students:

3. We are no strangers to technology, such as colorful TVs, fully functional mobile phones, omnipotent computers, and magical spacecraft ......All this, we feel the great happiness and sense of accomplishment brought to us by technology. At the same time, the changes that technology has made to nature are awe-inspiring. For example, the Great River intercepted the flow of the Three Gorges, opened up the world and developed transportation, science and technology made history progress rapidly, and science and technology made mankind proud.

4. Open the pages of history, browse the life of primitive human beings, drill wood to make fire, have no clothes, and have a short life; Nowadays, the household appliances are complete, giving us lighting and heating; Medical technology is developed, the average life expectancy of Chinese is more than 70 years old, in case of emergency, do not need to write letters and send words, only need to press the mobile phone keyboard, you can contact and communicate, save the danger, and even ** call, tired day home, turn on the TV to see the world's events, start the computer, you can gallop in the ocean of thoughts, household appliances, people are moved, rice cooker cooks fragrant rice, air conditioning is used, not afraid of high temperature and cold, turn on the TV, according to personal preferences, select the channel, The family is happy ......The field of technology penetration is endless, from work to life, and then from study to entertainment, isn't it?

5. Watt invented the steam engine, Edison developed the incandescent lamp, Franklin invented the lightning rod, and Bell invented the ......These miracles, these glories, have become a thing of the past, think about these scientists, their spirit, worthy of our eternal memory and learning, not a failure can achieve success, they are using a lifetime to prove a result, they are using a lifetime of labor to harvest a success, perhaps, there are more obscure scientific and technological workers, there is no lifetime of success, but I admire them from the heart, failure is the mother of success, we should not be afraid of failure again and again in the school to lay the foundation of the study stage, You shouldn't care about success again and again, as long as you have a courageous attitude, you will definitely be ready for success.

6. Science and technology are not only around me, but also in my heart, I hope we will be together in the new century, study diligently, and make our common efforts and contributions to the development of China's science and technology.