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
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。