【单选题】听力原文: M: How long have you been working in the laboratory? W: For almost three years, ever since I got my degree. M: Your bachelor' s? W: No, my master's. I didn't try to get a job until I had my mast...
【单选题】双代网络图中的虚工作是( ),它起着联系和切断逻辑关系的作用。
【单选题】双代网络图中的虚工作是( ),它起着联系和切断逻辑关系的作用。
【单选题】听力原文:M: How long have you been working in the laboratory? W: For almost three years, ever since I got my degree. M: Your bachelor's? W: No, my master's. I didn't try to get a job until I had my master...
【单选题】—Have you decided where to go for your summer vacation? —Not __________. We may go to Qingdao.
【单选题】—Have you finished your homework _____? —Not _____. I'll need another hour. [ ]
【单选题】Jenny,have you ever seen a moving scene ______ many people rushed a stranger getting a heart attack to hospital?
【简答题】在双代号网络图中,虚箭线是实际工作中并不存在的一项虚拟工作,故它们既不占用时间,也不消耗资源,。一般起着工作之间的联系、区分和 ________ 的作用。