update...

examcloud-common-models/src/main/java/cn/com/qmth/examcloud/api/commons/exchange/BaseResponse.java

@@ -11,7 +11,7 @@ public abstract class BaseResponse extends ExchangeBean {
 
     private static final long serialVersionUID = 1755304211766414171L;
 
-    @ApiModelProperty(value = "耗时（毫秒）", example = "99", hidden = true)
+    @ApiModelProperty(value = "耗时（毫秒）", example = "99")
     private Long cost;
 
     public Long getCost() {