铁路行车技术作业是指：列车的（）作业、列车的（）作业、列车的解编作业、车辆的摘挂作业、车辆的取送作业。
参考答案：接发；到发技术
下列句中均有一处错误，请指出并改正。
1. Martin is a fifteen-years-old boy.
_______________
2. Jane's words made us to feel happy.
3. He doesn't seem being very happy.
4. When he was young, he often got into troubles with the police.
5. The doctor advised my father to give up to smoke.
王某与吴某约定，由吴某用自己的卡车将王某的5吨玉米由甲地运往乙地，王某支付吴某运费300元，王某与吴某之间的民事法律关系的客体是：
A．5吨玉米
B．吴某要求王某支付300元运费
C．吴某将5吨玉米由甲地运往乙地的行为
D．5吨玉米和300元运费
