验证和确认的主要活动有______。
A．可跟踪性分析
B．关键性分析
C．评估和接口分析
D．以上全部
参考答案：D
解析： 验证是检查软件开发的各个阶段过程活动的结果是否满足规格说明的描述，证实各阶段和阶段之间的逻辑协调性、完备性和正确性。确认是证实在一个给定的外部环境中软件的逻辑正确性，即是否满足用户的要求。验证和确认的主要活动有关键性分析、可跟踪性分析、评估和接口分析等。
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| Last Wednesday, Mr Chen took his class to the Space Museum. There 1 _many things about space there. First, the children saw a film about space travel. They saw 2 _ the space shuttle took off in space and later landed on earth 3 . It was very exciting and the children felt they were traveling in space 4 ! After the film, Mr Chen took 5 to see some models of rockets . 6 _ the space shuttle. The models looked very real, but they were much 7 . Then the children saw some moon rocks. Two 8 landed on the moon in 1969. They put an American flag there. Then they took some rocks back to the 9 . 10 the children left, they also watched a video about people living and working in a space lab. People could stay in the space lab for months. | ||||
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