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A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.

A. on
B. of
C. in
D. for

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产生于上世纪80年代的法国初等教育和中等教育改革，其基本思想可以概括为“分权、现代化与适应”。

A. 正确
B. 错误

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She likes to spend time（）with her grandchildren.

A. play
B. to play
C. playing
D. played

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一位十进制数用四位二进制数表示的方法很多，常用的交换码是（）码。

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Which statement correctly describes the Cisco implementation of RSTP？（）

A. PortFast， UplinkFast， and BackboneFast specific configurations are ignored in Rapid PVST mode.
B. RSTP is enabled globally and uses existing STP configuration.
C. Root and alternative ports transition immediately to the forwarding state.
D. Convergence is improved by using sub-second timers for the blocking， listening， learning， and forwarding port states.

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A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.

A. on B. of C. in D. for

产生于上世纪80年代的法国初等教育和中等教育改革，其基本思想可以概括为“分权、现代化与适应”。

She likes to spend time（）with her grandchildren.

一位十进制数用四位二进制数表示的方法很多，常用的交换码是（）码。

Which statement correctly describes the Cisco implementation of RSTP？ （）

A. on
B. of
C. in
D. for

Which statement correctly describes the Cisco implementation of RSTP？（）