根据下表提供的数据，（）最有可能在时间和成本的约束内完成。
A．项目甲
B．项目乙
C．项目丙
D．项目甲和项目乙
参考答案：A
解析：
本题可以通过计算并比较这三个项目的SPI和CPI来判断。
SPI=EV/PV，CPI=EV/AC。
通过上述公式可知，SPI的值越大，说明项目的实际进度越发会相对提前于计划进度。而CPI的值越大，说明项目的实际成本相对于预算会越发节省。
经计算，项目甲乙丙的SPI、CPI如下表所示。
从上表中可知项目甲的SPI、CPI均为最大值，因此项目甲最有可能在时间和成本的约束内完成。
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| When I entered Berkeley, I hoped to earn a scholarship. Having been a Straight-A student, I believed I could 1 tough subjects and really learn something. One such course was World Literature given by Professor Jayne. I was extremely interested in the ideas he 2 in class. When I took the first exam, I was 3 to find a 77, C-plus, on my test paper, 4 English was my best subject. I went to Professor Jayne, who listened to my arguments but remained 5 . I decided to try harder, although I didn't know what that 6 because school had always been easy for me. I read the books more carefully, but got another 77. Again, I 7 with Professor Jayne. Again, he listened patiently but wouldn't change his 8 . One more test before the final exam. One more 9 to improve my grade. So I redoubled my efforts and, for the first time. 10 The meaning of the word "thorough". But my 11 did no good and everything 12 as before. The last hurdle (障碍) was the final. No matter what 13 I got, it wouldn't cancel three C-pluses. I might as well kiss the 14 goodbye. I stopped working head. I felt I knew the course material as well as I ever would. The night before the final, I even 15 myself to a movie. The next day I decided for once I'd have 16 with a test. A week later, I was surprised to find I got an A. I hurried into professor Jayne's office. He 17 to be expecting me. "If I gave you the As you 18 , you wouldn't continue to work as hard." I stared at him. 19 that his analysis and strategy (策略) were correct. I had worked my head 20 , as I had never done before. I was speechless when my course grade arrived: A-plus. It was the only A-plus given. The next year I received my scholarship. I've always remembered Professor Jayne's lesson: you alone must set your own standard of excellence. | ||||
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