PDCA循环中的A是指。（） ["检查，找出问题","持续改进","执行，实现目标"]
Which configuration should be done in order to improve the performance of the Cisco Unified Wireless IP Phone 7921G in a WLAN infrastructure?（） ["enable aggressive load balancing","enable coverage hole detection","disable dynamic transmit power control","enable short preamble"]
压力容器上安装的压力表其显示值为（） ["容器内的绝对压力","容器内的表压力","容器内的表压力与大气压力的和","以上答案都不对"]
在证券发行信息披露制度中处于核心地位的文件是（） ["上市公告书","重大事项公告书","招股说明书","年报概要"]
Choose the element that differentiates the Cisco SBCS solution from the competing Avaya IP Office and Nortel BCM 50 solutions.（） [" SBCS providesPoE through a modular upgrade."," SBCS supports more analog trunks than the competitors."," Only SBCS provides bundled conference calling."," Only SBCS provides a wireless option."]
某企业本期有关资料如下：单位直接材料成本10元，单位直接人工成本5元，单位变动性制造费用7元，固定性制造费用总额4000元，单位变动性销售与管理费用4元，固定性销售与管理费用1000元。期初存货量为零，本期生产量1000件，销售量600件，单位售价40元。要求分别采用完全成本法和变动成本法计算下列指标：单位产品成本；
