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一、单项选择题:下列各题的四个选项中,只有一个是正确的。(共150分)月球是地球唯一的天然卫星。在地面基地集训的宇航员用天文望远镜进行连续的月面观察后,发现月球在绕地球公转过程中,总是同一个面朝向地球。宇航员登上月球后,看到太阳东升西落,且连续两次东升所需的时间,约相当于地球上连续两次看到太阳东升所需时间的27.32倍。宇航员发现月球由西向东绕地球公转一周需27.32日,且月球公转过程中与地球间的距离是要变化的。宇航员还发现月球上温差很大,白天在阳光照射的地方,温度可达127℃,夜晚则降到-183℃。据此回答1—3题。1.月球绕地球公转时,总是一个面朝向地球,其
First, single-choice questions: Of the four options listed below, only one is correct. (150 points in total) The moon is the only natural satellite on Earth. The astronauts who were trained on the ground base used astronomical telescopes to observe the surface of the moon. It was found that the moon always faces the earth in the same plane during orbit around the earth. After the astronaut stepped on the moon, he saw the sun rise and fall in the east, and the time required for two consecutive eastward rises was approximately 27.32 times the time it takes for Earth to see the sun rising continuously. Astronauts found that the moon needed to orbit the earth from west to east for 27.32 days, and the distance between the moon and the earth during the revolution of the moon was to change. The astronauts also found that the temperature difference on the moon was very large. During the daytime, the temperature reached 127°C in the sunlit place and fell to -183°C in the night. Answer 1-3 questions accordingly. 1. When the moon orbits the earth, it is always facing one side of the earth.