下列针对用户的会计信息质量是（）。 ["可理解性","可靠性","有用性","重要性"]
2008年12月30日“坏账准备”账户有借方余额2000元，年末应收账款余额1000万元。如果按5‰提取坏账准备，则“坏账准备”账户的年末余额为（）。 ["贷方余额48000元","贷方余额50000元","借方余额48000元","借方余额52000元"]
东方各国社会由于在近代受到西方的冲击和刺激，其统一性表现得更为明显。
What two descriptions best define DWDM？ （） [" a WDM system that is compatible with EDFA technology"," an optical technology for transmitting up to 16 channels over multiple fiber strands"," an optical technology for transmitting up to 32 channels over multiple fiber strands"," a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM"," a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM"]
活塞式压力计检定前的清洗包括（） ["对被检压力计的活塞系统和压力校验器管道进行彻底清洗","注入清洁的工作液体","作必要的排气","以上三项"]
频充曲线图
