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专利权起源于资本主义社会的财产权。

A. 正确
B. 错误

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You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this? （）

A. There is insufficient room for more than one image.
B. The router has detected a copy of the current software image on the TFTP server.
C. The file can be relocated and not compressed.
D. The image to load is a binary executable file.

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以正弦跳汰周期为例叙述跳汰机周期的第四阶段。

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操作液压支架前应注意那些问题？

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转向传动机构在工作中不应承受（）的任务。

A. 垂直载荷
B. 传递转向
C. 吸收振动
D. 路面冲击

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专利权起源于资本主义社会的财产权。

A. 正确 B. 错误

You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this? （）

以正弦跳汰周期为例叙述跳汰机周期的第四阶段。

操作液压支架前应注意那些问题？

转向传动机构在工作中不应承受（）的任务。

A. 正确
B. 错误