例行测试和巡检的周期由各省、各地市分公司根据（）自行制定。 ["差异化服务标准和售后服务协议","大客户的需求"]
（）is not a job of the radar antenna. ["To receive the high-frequency pulses from the transmitter","To focus the pulses into a beam，and send them into space","To pick up reflected pulses coming from objects that have been struck by the beam","To reflect microwave"]
阀片与阀座的质量标准是什么？
下列属于半夏炮制品的是（） ["清半夏","姜半夏","法半夏","水半夏"]
从萨珀的职业发展理论看，可将职业生涯分为（）阶段。 ["成长阶段","立业与发展阶段","维持阶段","衰退阶段","探索阶段"]
金属保温盒、托盘、钩钉制作与安装，其绝热工程量按体积计算还是按重量计算？
