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系统生命周期法将系统开发分为（）几个阶段。
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在会计电算化管理过程中，负责数据软盘、系统软盘及各类账表、凭证的存档保管工作的是（）。
B One night in February 1962, John H. Glenn, Jr. , flew over Australia. The man in the Mercury (水星号) capsule (太空舱) was alone, but friendly voices reached him by radio. On the dark land 100 miles below, he saw a sprinkling (零星) of lights. They marked the city of Perth, where people had turned on their lights as a greeting to him. In Friendship 7, Glenn radioed, "Tile lights show up very well. Thank everybody for turning them on." His capsule raced on to the east. During his three orbits of the earth, Glenn could always reach one of eighteen tracking stations. Some of them were on ships at sea. Others were in the United States. Many of the stations had been built with the help of the other countries. These countries allowed Americans to bring in radio equipment and set it up. Without the help of such lands as Nigeria, Zanzibar, and Mexico, there would have been breaks in the worldwide radio network. John Glenn, Jr. , was the first American to orbit the earth. Pot his flight, the tracking network covered 60,000 route miles. Five hundred people worked in the stations along the route. Since his flight, the network has grown. Today, it covers more thanlO0,000 route mi- les and has about one hundred stations. One-third of these stations arc outside the United States. Why did the people in Perth turn on their lights
在计算机发展过程中，中小规模集成电路计算机属于第（）代计算机。
计算机的终端包括（）。
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