信汇
参考答案：是汇出行应汇款人的申请，用航空信函指示汇入行解付一定金额给收款人的汇款方式。
─Mrs. Zhang was sent to teach English in a poor mountain village last year.
─She said she would never forget some pleasant ______while working there.[ ]
A. experiments
B. expressions
C. experiences
D. emotions
铁路车辆一般来说，其结构均由（）及车辆内部设备等五大部分组成。
