doc format modify

Signed-off-by: Nzhangxin_T <zhangxin312@huawei.com>

zh-cn/application-dev/background-task-management/background-task-dev-guide.md

@@ -7,7 +7,7 @@
 
 ## 接口说明
 
-```
+```js
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
 ```
 
@@ -31,51 +31,60 @@ import backgroundTaskManager from '@ohos.backgroundTaskManager';
 
 ## 开发步骤
 
+
 1. 申请延迟挂起
-   ```
-   import backgroundTaskManager from '@ohos.backgroundTaskManager';
-   let myReason = 'test requestSuspendDelay';
-   let delayInfo = backgroundTaskManager.requestSuspendDelay(myReason, () => {
-       console.info("Request suspension delay will time out.");
-   });
-   var id = delayInfo.requestId;console.info("requestId is: " + id);
-   ```
+```js
+import backgroundTaskManager from '@ohos.backgroundTaskManager';
+
+let myReason = 'test requestSuspendDelay';
+let delayInfo = backgroundTaskManager.requestSuspendDelay(myReason, () => {
+    console.info("Request suspend delay will time out.");
+});
+
+var id = delayInfo.requestId;console.info("requestId is: " + id);
+```
+
 
 2. 获取进入挂起前的剩余时间
-   ```
-   backgroundTaskManager.getRemainingDelayTime(id).then( res => {
+```js
+backgroundTaskManager.getRemainingDelayTime(id).then( res => {
     console.log('promise => Operation succeeded. Data: ' + JSON.stringify(res));
-   }).catch( err => {
+}).catch( err => {
     console.log('promise => Operation failed. Cause: ' + err.data);
-   });
+});
    ```
 
+
 3. 取消延迟挂起
-   ```
-   backgroundTaskManager.cancelSuspendDelay(id);
-   ```
+```js
+backgroundTaskManager.cancelSuspendDelay(id);
+```
 
 
 ## 开发实例
 
-```
+```js
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
 let myReason = 'test requestSuspendDelay';
+
 // 申请延迟挂起
 let delayInfo = backgroundTaskManager.requestSuspendDelay(myReason, () => {
     console.info("Request suspension delay will time out.");
 });
+
 // 打印延迟挂起信息
 var id = delayInfo.requestId;
 var time = delayInfo.actualDelayTime;
 console.info("The requestId is: " + id);
 console.info("The actualDelayTime is: " + time);
+
 // 获取应用程序进入挂起状态前的剩余时间
 backgroundTaskManager.getRemainingDelayTime(id).then( res => {
     console.log('promise => Operation succeeded. Data: ' + JSON.stringify(res));
 }).catch( err => {
     console.log('promise => Operation failed. Cause: ' + err.data);
 });
+
 // 取消延迟挂起
 backgroundTaskManager.cancelSuspendDelay(id);
 ```

zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md

@@ -129,7 +129,7 @@ cancelSuspendDelay(requestId: number): void
 
 ## backgroundTaskManager.startBackgroundRunning
 
-startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: WantAgent, callback: AsyncCallback<void>): void;
+<sup>[8]</sup> startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: WantAgent, callback: AsyncCallback&lt;void&gt;): void;
 
 向系统申请长时任务，使用callback形式返回结果。
 
@@ -138,7 +138,7 @@ startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: Want
   | -------- | -------- | -------- | -------- |
   | context | Context | 是 | 应用运行的上下文 |
   | bgMode | BackgroundMode | 是 | 向系统申请的后台模式 |
-  | wantAgent | WantAgent | 是 | 通知参数，用于指定长时任务通知点击跳转的界面 |
+  | wantAgent | WantAgent | 是 | 通知参数，用于指定长时任务通知点击跳转的界面。使用方式参考：<sup>[8]</sup>  |
   | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回启动长时任务的结果 |
 
 - **示例**：
@@ -176,7 +176,7 @@ wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
 
 ## backgroundTaskManager.startBackgroundRunning
 
-startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: WantAgent): Promise&lt;void&gt;
+<sup>[8]</sup> startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: WantAgent): Promise&lt;void&gt;
 
 向系统申请长时任务，使用promise形式返回结果。
 
@@ -223,7 +223,7 @@ wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
 
 ## backgroundTaskManager.stopBackgroundRunning
 
-stopBackgroundRunning(context: Context, callback: AsyncCallback&lt;void&gt;): void;
+<sup>[8]</sup> stopBackgroundRunning(context: Context, callback: AsyncCallback&lt;void&gt;): void;
 
 向系统申请取消长时任务，使用callback形式返回结果。
 
@@ -252,7 +252,7 @@ backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext(), callbac
 
 ## backgroundTaskManager.stopBackgroundRunning
 
-stopBackgroundRunning(context: Context): Promise&lt;void&gt;;
+<sup>[8]</sup> stopBackgroundRunning(context: Context): Promise&lt;void&gt;;
 
 向系统申请取消长时任务，使用promise形式返回结果。
 
@@ -279,7 +279,7 @@ backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext()).then(()
 
 ```
 
-## BackgroundMode
+## <sup>[8]</sup> BackgroundMode
 
 | 参数名                  | 参数 | 描述 |
 | ----------------------- | -------- | -------- |