各种生物在长期进化过程中,都形成一种对外界环境的适应能力。在急剧变化或恶劣的条件下,适应性较强的生物就可能生存下来,反之就可能被淘汰。对于人来说,由于社会的发展,活动范围的不断扩大,对人的适应能力的要求就更高了,如:高温、低温、噪声、振动、航天航海的超重、失重、高山的缺氧、潜水的高压、高层建筑失火时的脱险、车祸中应急动作、遭到暴力袭击时的自卫和解脱等。试想一下赤道非洲人的耐热,爱斯基摩人的耐寒,撒喻拉沙漠地带人的耐渴,帕米尔高原人的耐缺氧,格陵兰岛人的耐寂静的能力就会明白这个道理。那么,现在从事和将来必须从事 All kinds of organisms in the long-term evolutionary process, have formed a kind of adaptability to the external environment. In the drastic changes or harsh conditions, adaptable organisms may survive, and vice versa may be eliminated. For people, due to the development of society and the continuous expansion of the scope of activities, people’s requirements for adaptability are even higher: high temperature, low temperature, noise and vibration, overweight and weightlessness in spaceflight, high altitude hypoxia, Diving high pressure, high-rise building fire escape, emergency actions in a car accident, when violent attacks self-defense and relief. Imagine the equatorial Africans heat, Eskimos cold hard, Jiyu pull people in the desert, thirst resistance, resistance to hypoxia in the Pamirs, Greenpeace’s resistance to silence will understand this truth. Well, now and in the future must be engaged