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目前,人类已知太空环境与地面环境不同,并利用这些不同的环境进行太空育种、新材料制备、生命科学实验等。请你说说太空物理环境有哪三个主要特点。答:与地面环境相比,太空物理环境具有三个主要特点:①微重力;②强辐射(包括电磁辐射、宇宙射线);③高真空。1987年以来,人类已在太空环境中利用航天器搭载植物种子再返回地面,培育了数百种农作物、园艺作物的新品种。这些新品种,不仅大幅度提高农作物的产量,而且品质得到了优化、改善。例如,蛋白质、维生素的含量显著增加,营养价值大大提高,有的品种口感风味得到改善。
At present, humans have known that the space environment is different from the ground environment and uses these different environments for space breeding, new material preparation, and life science experiments. Please tell us what are the three main characteristics of the space physical environment. A: Compared with the ground environment, the space physical environment has three main characteristics: 1 microgravity; 2 strong radiation (including electromagnetic radiation, cosmic rays); 3 high vacuum. Since 1987, humans have used spacecraft to carry plant seeds in the space environment and returned to the ground to cultivate new varieties of hundreds of crops and horticultural crops. These new varieties not only greatly increase the output of crops, but also optimize and improve their quality. For example, the content of protein and vitamins is significantly increased, the nutritional value is greatly improved, and the taste of some varieties is improved.