【简答题】How many passengers was MV Mitali designed to carry?
【单选题】All flights______because of the snowstorm, many passengers could do nothing but take the train.
【简答题】绝对值等于4的有理数是______,平方等于4的负数是______.
【简答题】查询选修了所有课程的学生学号(sno)。
【简答题】请简述 Swing 中的布局管理器有哪些