题目

UFO stands for unidentified flying object(不明飞行物). Many people reported having seen UFOs in the sky. A lot of countries tried to research into them and in 1952 they got the name of UFO.      There were several reports published in the 19th century which were related to UFOs. Denison Daily News in its report of 25th January, 1878 wrote that a farmer, Martin saw a flying object in the sky and it was just like a plate. This was the first time that the word plate had been related to the UFO.      First reports on UFOs came during the World War II. In 1947 the pilot Kenneth下列骨骼肌附着骨的模式图中，正确的是（ ）A.① B．② C．③ D．④