带电作业工作票签发人和工作负责人、专责监护人应由具有具备带电作业资格、带电作业实践经验的人员担任。（ ）
参考答案：对
制锁角是指
A．义齿部件与余留牙之间的夹角
B．义齿就位道与基牙长轴间的夹角
C．义齿就位道与基牙邻面间的夹角
D．义齿就位道与脱位道的方向之间所 形成的角度
E．义齿脱位道与基牙邻面间的夹角
An instruction is made up of operations that (68) the function to be performed and operands that represent the data to be operated on. For example, if an instruction is to perform the operation of (69) two numbers, it must know (70) the two numbers are. The processor’s job is to (71) instructions and operands from memory and to perform each operation. Having done that, it signals memory to send it (72) instruction.
A．add
B．added
C．adding
D．additional
