【单选题】进行物质流动分析需要关注以下哪项( )Which of the following should be taken into attention in conducting a material flow analysis( )
A.
系统组分 The components of a system
B.
物质库存及存量 Material in-use stock and its size
C.
系统各组分间物质流动关系(流动强度和方向) The material flow relationship among system components (flow rate and direction)
【简答题】由数字1,2,3,4组成五位数 . a 1 a 2 a 3 a 4 a 5 ,从中任取一个记ξ为组成这个数的相同数字的个数的最大值,则ξ的数学期望为______.
【单选题】开展物质人为流动分析时应优先选择( )When carrying out a material anthropogenic flow analysis, priority should be given to ( )
A.
物质流动不受人类活动影响的物质 The material whose flow cannot be affected by human activity
B.
物质流动受人类活动影响较小的物质 The material whose flow is lightly affected by human activity
C.
物质流动受人类活动影响较大的物质 The material whose flow is strongly affected by human activity
D.
物质流动受人类活动与自然因素影响程度相当的物质 The material whose flow is affected by human activities to the same extent as natural forces
【简答题】There are three major flows involved in global logistics: material flow, document flow and ___________ 。
【单选题】将领导特征分为个性特征、能力特征和激励特征是由谁提出的( )。
【简答题】When a battery is connected to a ___________ material, current will flow through the material. ( conduct )