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【单选题】

Which of the following statements is mot correct about mirroring?（）

A、Mirroring, with the write-verify option turned on, can be used to increase performance.

B、Mirroring is a better choice that disk-striping, for large sequential-access file system when one is looking for performance.

C、Mirroring, with a parallel-scheduling policy, may improve I/O read-operation performance.

D、Mirroring, with maximum inter-disk allocation policy, is used to enhance availability.

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第2题
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第3题
[单选题] The center of flotation of a vessel is the point in the waterplane（）.

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第4题
[单选题] For a floating vessel,the center of the floating is the point in the waterpiane.（）.

A、aboat which the vessel lists and trims  B、which coincides with the center of buoyancy  C、which, in the absence of external forces, is always vertically aligned with the center of gravity  D、which is shown in the hydrostatic tables as VCB  

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第5题
[单选题] A class B network 129.35 has 10 subnets. Which of the following options is the correct subnet mask？（）

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第6题
[单选题] For a floating vessel，the center of flotation is the point in the waterplane（）.

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第7题
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第8题
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第10题
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