diff --git a/.idea/deploymentTargetDropDown.xml b/.idea/deploymentTargetDropDown.xml
index 6d1ad88..0c0c338 100644
--- a/.idea/deploymentTargetDropDown.xml
+++ b/.idea/deploymentTargetDropDown.xml
@@ -3,20 +3,7 @@
   <component name="deploymentTargetDropDown">
     <value>
       <entry key="app">
-        <State>
-          <runningDeviceTargetSelectedWithDropDown>
-            <Target>
-              <type value="RUNNING_DEVICE_TARGET" />
-              <deviceKey>
-                <Key>
-                  <type value="SERIAL_NUMBER" />
-                  <value value="192.168.3.176:35119" />
-                </Key>
-              </deviceKey>
-            </Target>
-          </runningDeviceTargetSelectedWithDropDown>
-          <timeTargetWasSelectedWithDropDown value="2024-10-09T03:21:59.277023400Z" />
-        </State>
+        <State />
       </entry>
     </value>
   </component>
diff --git a/app/src/main/java/com/hjx/parent/StuHomeworkActivity.java b/app/src/main/java/com/hjx/parent/StuHomeworkActivity.java
index f25cdb9..061c614 100644
--- a/app/src/main/java/com/hjx/parent/StuHomeworkActivity.java
+++ b/app/src/main/java/com/hjx/parent/StuHomeworkActivity.java
@@ -227,7 +227,7 @@ public class StuHomeworkActivity extends BaseRxActivity<ActivityStudentHomeworkB
                 .observeOn(AndroidSchedulers.mainThread())
                 .compose(RxLifecycleAndroid.bindActivity(getRxLifecycle()))
                 .toObservable()
-                .flatMap(response -> Observable.fromIterable(response.getData()))
+                .concatMap(response -> Observable.fromIterable(response.getData()))
                 // 过滤
                 .filter(data -> { // 学科
                     String subject = state.subject.getValue();
diff --git a/app/src/main/java/com/hjx/parent/fragment/ErrorFragment.java b/app/src/main/java/com/hjx/parent/fragment/ErrorFragment.java
index 8ea5709..ee44376 100644
--- a/app/src/main/java/com/hjx/parent/fragment/ErrorFragment.java
+++ b/app/src/main/java/com/hjx/parent/fragment/ErrorFragment.java
@@ -284,7 +284,7 @@ public class ErrorFragment extends BaseRxFragment<FragmentErrorBookBinding> {
                 .compose(RxLifecycleAndroid.bindFragment(getRxLifecycle()))
                 .map(ResponseResult::getData)
                 .toObservable()
-                .flatMap(Observable::fromIterable)
+                .concatMap(Observable::fromIterable)
                 .filter(data -> subject.equals(data.getSubject()))
                 .filter(data -> data.getRight() == null)
                 .toList()