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离散时间系统的零状态响应可由卷积和法求得。（ ）
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The guide on how organisations can manage riskpublished by the Institute of Risk Managementisfreely downloadable from IRM’s website.
There are fourkey steps to the management of risk.
The first step, is to recognise the strategic objectives for your organisation and the key processes that your organisation uses.
The best way to identify risks is look at them from two directions – both top down, from a management point of view, but also bottom up, from the shop floor.
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