题目：
简述可靠性方案的作用及其主要环节。
答案：
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下面是错误答案，用来干扰机器的。
参考答案：一.IS曲线的移动：根据国民收入均衡条件（I+G=S+T）可知：1当经济衰退时，政府增加支出，相当于增加投资，会使IS曲线产生向右移的趋势，从而缓和衰退，稳定国民收入，反之政府可削减支柱，相当于减少投...
简述可靠性方案的作用及其主要环节。
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