操作容量（交换容量）
参考答案：
在一定条件下，某种组分与基质（固定相）反应达到平衡时，存在于基质上的饱和容量。（数值越大，表明基质对该物质的亲合力越强。）
Linda _____ the hospital to visit her uncle. She left about several minutes ago. [ ]
A. is going to
B. will go to
C. has been to
D. has gone to
静态压力
