The problem won't be settled until we ________a chance to discuss it thoroughly.
A:have had
B:will have
C:will have had
D:would have
读潜水位等值线图,右图表示甲图中XY两地间的剖面图。读图回答下列各题。
2016年人民币新版100元在市场上开始广泛流通,被人们昵称为“土豪金”。我国最早也是世界最早的纸币“交子”出现在( )
下列粒子最小的是( )
计算