—What have you decided to buy for your mother _______ Mother's Day?

—Some flowers. [ ]

A. at

B. on

C. to

D. in

由于输入测井曲线之间深度不匹配，可使计算机的输出结果失去应有的（）。

A.地质意义

B.匹配关系

C.组合

D.位置