What is pre－emption？ （Intel)

What is the state of a process if a resource is not available？ （Intel)

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What is the state of a process if a resource is not available？ （Intel)

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What is pre－emption？

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What is pre－emption？

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（课外选材)According to experts, the advantage of modified food is that it helps in pre

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What does the "in thing" in the 2nd paragraph mean？A．Curiosity.B．Fashion.C．Necessity.D．Pre

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What is the main idea of the news item？A．Foreign investment in unstable regions.B．BP"s pre

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