【简答题】关于如下程序结构的描述中,哪一项是正确的? for( ; ; ) {
循环体;
}A. 不执行循环体 B. 一直执行循环体,即死循环 C. 执行循环体一次 D. 程序不符合语法要求
【单选题】关于继电器描述错误的一项是?
A.
继电器是一种控制电器,是实现自动控制和保护电力拖动装置的自动电器。
D.
动作时间(吸合时间及释放时间)是继电器的重要参数,为确保继电器性能稳定,一般会要求动作时间较长。
【简答题】A.She hasn't prepared the course outline yet. B.She'll distribute the course outline during the next class. C.There aren't any copies of the course outline left. D.The man can get the course outline a...
【单选题】Lily got up at 6 o’clock ,but she realized it was Sunday as soon as she prepared her school bag.A
A.
Lily got up at 6 o’clock____,but she realized it was Sunday as soon as she prepared her school bag. A.as possible