题目内容

胶轮车每行驶()km必须拆检并清洗前后桥差速器。

A. 1500
B. 5000
C. 10000
D. 15000

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Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?()

A. presentation
B. session
C. transport
D. network
E. physical

城镇储户问卷原始调查问卷按规定应保存二年以上。

A. 正确
B. 错误

起重用钢丝绳应每年试验一次,以()倍容许工作荷重进行10min的静力试验,不应有断裂和显著的局部处延伸现象。

A. 4
B. 3
C. 2
D. 1

说明确定抚育间伐强度的要求和方法。

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