各种生物在长期进化过程中,都形成一种适应外界环境的能力。对于人来说,由于科学技术和生产力的发展,人们活动范围的不断扩大,劳动的紧张程度和复杂程度的不断提高,对人的适应能力的要求也越来越高。高温,低温,噪声振动,以及高山的缺氧,潜水的高压,减压和氧中毒,航天的失 Various organisms in the long-term evolutionary process, have formed a kind of ability to adapt to the external environment. For people, due to the development of science and technology and productive forces, the scope of people’s activities is constantly expanding, the degree of labor tension and complexity are constantly increasing, and people’s requirements for adaptability are also getting higher and higher. High temperature, low temperature, noise and vibration, as well as mountain hypoxia, diving high pressure, decompression and oxygen poisoning, loss of space