以下哪几种属于（）常用接续金具。
A.钳压管
B.并沟线夹
C.连接管
D.跳线线夹
参考答案：A, B, C, D
Once he has _______, nothing can change his mind.
A．made up his mind
B．decided his mind
C．determined his mind
D．made his mind
报告既可用于向上行文，又可用于向下行文，如调查报告等。
