长拳运动中呼吸法总的要求是（）。
A.“气要提”
B.“气要托”
C.“气要聚”
D.“气要沉”
参考答案：D
隔离开关应具备（）等附属装置
A.操动机构
B.信号指示器
C.闭锁装置
D.灭弧单元
Digital Selective Calling means a technique using（）which which enables a radio station to establish contact with, and transfer information to another station or group of stations and complying with the relevant recommendations of the CCIR.
A.digital codes
B.code messages
C.norse codes
D.distress messages
