下列要件中，属于工程项目管理信息系统应用必备要件的足()
A. 组织件
B. 系统件
C. 管理件
D. 信息件
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What happens when the parking ticket is NOT validated？
A. The vehicle would be towed.
B. The driver must be issued a different ticket.
C. The driver should pay parking fees.
D. The driver should present his ID card to the library clerk.
常用的几种加速控制器，气动式加速调节器是根据：()，控制加速供油量按一定规律增加。答案：液压延迟器是按()，使加速供油量按一定规律增加的。答案：升压限制器则是按时间程序控制()，使加速供油量按一定规律增加。
What is NOT listed as a feature of Riverwalk？
A. Places to walk.
B. A fitness center.
C. A swimming pool.
D. A cinema.
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