探月工程三步走

阅读理解人与社会体裁:说明文词数:298 With so many satellites launched,China has largely completed its High-resolution Earth Observation System,providing land observation services.Now China has made another great achievement,which attracts the attention of the whole globe.China’s success of the Chang’e-5 mission marked the conclusion of a three-step lunar exploration program that consisted of orbiting。