Time1mid-8th century to19th century1the last few decades of the 9th century, since the 1940s.

Marks the invention and use of the steam engine, the widespread application of electricity, the invention and application of electronic computers, atomic energy and space science and technology.

In essence (content), machine production replaces manual labor, electricity replaces steam power automation, and intelligence replaces electrification.

Influence on productivity (1) makes productivity develop like a hurricane that has never been seen before in human history; (2) It brought the first leap in the productive forces of capitalist society; (3) It has created enormous social wealth that can't be compared with any previous era; (1) electricity began to replace steam power as the main energy source, and mankind entered the electrical age from age of steam; (2) the capitalist world. 2) greatly expanding the scope of labor objects; 3) Improve the scientific and cultural quality of workers.

The influence of capitalist system on production relations has finally been established. 19 at the end of the 20th century, major capitalist countries entered the stage of imperialism one after another, and the capitalist relations of production were partially adjusted.

10, the influence of three scientific and technological revolutions inspired us:

1)* Science and technology are the primary productive forces, and scientific and technological progress is the decisive factor for economic development (P 128, para. 2).

2) The improvement of workers' quality, the innovation of production tools and the expansion of labor objects all depend on science and technology, and at the same time can promote the development of productive forces. The consolidation and establishment of the new system ultimately depends on the development of productive forces.

What should we teenagers do in science and technology? Teenagers should understand the truth that they will be beaten if they fall behind, study hard to realize national rejuvenation, carry forward the spirit of hard work and innovation, and aspire to serve the country with knowledge and strengthen the country through science and technology.

What should our country do in science and technology? (1) China should speed up the implementation of the strategy of rejuvenating the country through science and education, vigorously develop productive forces, fundamentally consolidate and develop the socialist system, put accelerating scientific and technological progress in the key position of economic and social development, and truly shift economic construction to the track of relying on scientific and technological progress and improving the quality of workers.

*(2) The new scientific and technological revolution is both a challenge and an opportunity for the development of all countries. The key is whether we can formulate an effective development strategy in time and improve our own innovation ability; If we take a positive and enterprising attitude, truly seize the opportunity and make a difference in developing high and new technologies, we can achieve leap-forward development.