36d

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6、打开锅盖，加入红枣、虫草花、枸杞煮15分钟。/iknow-pic.cdn.bcebos.com/d52a2834349b033bb6f390f21ace36d3d539bd9b"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/d52a2834349b033bb6f390f21ace36d3d539bd9b?x-bce-process=image%2Fresize%2Cm_...

等差数列求和公式：Sn=a1*n+n(n-1)d/2 S4=4a1+6d=2；S9=9a1+36d=-6;联立方程组解得a1=6/5，d=-7/15 所以Sn=6n/5-7n(n-1)/30

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被动物咬伤或者抓伤后如果出现皮肤破损，需要注射狂犬疫苗。狂犬病是一种死亡率100%的疾病，一旦发病后目前并没有任何方式可以进行治疗，所以预防狂犬病的发生是非常关键的。被动物咬伤或者抓伤后如果只是破皮并没有出血，这种情况属于Ⅱ级暴露需要注射狂犬疫苗。如果不仅破皮并且出现明显的出血、渗血则属于更...

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