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+# 带输出的前置任务
+
+前置任务输出可以在后续任务中使用
+
+比如上传证书到阿里云，会返回阿里云的CertId，之后其他阿里云的部署任务可以选择复用这个证书
+
+## 复用证书
+
+![img.png](images/pretask1.png)
+
+在后续任务中可以选择前置任务的输出
+
+![img.png](images/pretask2.png)
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