【单选题】She _____ a bit of money every month for her son's future education. [ ]
【单选题】I try to ______ a few minutes every day to do some exercises.
【判断题】Every set of DFDs must have one context diagram.
【简答题】一般确定两像片的相对位置有__________和__________两种方法
【单选题】We _________ some money every month in order to buy a computer.
【判断题】一般确定两张像片相对位置关系的方法有两种,所以有两种相对定向系统它们分别是连续像对相对定向系统和单独相对定向系统。