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【多选题】
下列属于降低库存的有()。A.
订货时间尽是靠近需求时间
B.
订货量尽量靠近需求量
C.
使生产速度与求变化吻合
D.
缩短生产配送周期
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反馈参考答案：
举一反三
【多选题】旅游经营者的安全责任包括( )
A.
应当承担旅游安全的主体责任
B.
加强安全管理，建立、健全安全管理制度
C.
关注安全风险预警和提示，妥善应对旅游突发事件。
D.
旅游从业人员应当严格遵守本单位的安全管理制度，接受安全生产教育和培训，增强旅游突发事件防范和应急处理能力。
E.
统计分析本行政区域内发生旅游安全事故的情况
【简答题】旅游安全管理的主体,包括 、 、 、 。
【简答题】旅游景区安全管理主要包括（ [填空(1)] ）、景区安全管理制度的制定、景区危险源的辨识、员工安全意识的培训、（ [填空(2)] ）、景区安全管理体系的建立和运行等。
【单选题】Why do people still argue about who deserves the credit for the concept of the laser?
A.
The researchers' notebooks were lost.
B.
Several people were developing the idea at the same time.
C.
No one claimed credit for the development until recently.
D.
The research work is still incomplete.
【单选题】Why do people still argue about who deserves the credit for the concept of the laser?
A.
The researchers' notebooks were lost.
B.
Several people were developing the idea at the same time.
C.
No one claimed credit for the development until recently.
D.
The work is still incomplete.
【单选题】According to the passage, the concept of systems involves all of the following EXCEPT
A.
the components of a collection
B.
the functional relationships among parts
C.
the links between different systems
D.
the origin of the scientific method
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