【判断题】信息必须来源于指定的机构,任何人不得将未经许可的媒体或机构的信息转载发布。()
【简答题】Every May 9 , Russia celebrated the victory over , a military Parade is usually held in Moscow to celebrate the day.
【简答题】One of the most famous student protests to ever occur in the United States took place between May 1 and May 4, 1970 at a college campus in the Midwestern state of Ohio. The reason this particular prot...
【单选题】They are working ______ time to fulfill the task according to the schedule.
【判断题】基准物质二水合草酸既可以用于标定碱标准溶液,也可以标定高锰酸钾标准溶液。
【简答题】甲企业本月生产 A 产品 400 件,使用材料 2500 千克,材料单价为 0.45 元 / 千克,原材料的单位产品标准成本为 3 元,即每件产品耗用 6 千克原材料,每千克原材料的标准价格为 0.5 元。计算材料成本差异并分析原因。