要求把人的心理看成是与人的社会实践活动密切联系的过程来考察和研究的原则是（）。 ["客观性原则","教育性原则","实践性原则","知识性原则"]
感知知识
随着托盘，集装箱的广泛应用，叉车属具仍然没有增加和改进。
The OSPF External LSA for prefix x.x.x.x exists in the OSPF database， but the prefix is not installed in therouting table. Which are possible explanations？（） ["Inbound distribute-list is configured under the ospf process and it is denying x.x.x.x","ASBR origination the LSA is not reachable","Route to the Forwarding Address in not an internal OSPF route","Route to the Forwarding Address is an internal OSPF route","Route to the ASBR does not follow the same path as the one to the Forwarding Addre"]
下列为低压液化气体的有（）。 ["氨气","氯气","氮气","氧气"]
感知知识的直接途径
