fix bug

app/controllers/zips_controller.rb

@@ -49,12 +49,12 @@ class ZipsController < ApplicationController
           @course = @exercise.course
 
           default_ex_users = @exercise.all_exercise_users(current_user.id).exercise_user_committed
-          @ex_users =  default_ex_users.limit 2   #仅导出已提交的，截止后则是全部为提交的。
+          @ex_users =  default_ex_users   #仅导出已提交的，截止后则是全部为提交的。
           #可以分班选择
           if group_id.present?
             exercise_students = @course.students.where(course_group_id: group_id)  # 试卷所分班的全部人数
             user_ids = exercise_students.pluck(:user_id).reject(&:blank?).uniq
-            @ex_users = @ex_users.where(user_id: user_ids).limit 2
+            @ex_users = @ex_users.where(user_id: user_ids)
           end
 
           default_ex_users_size = @ex_users.size

app/services/exercise_user_pdf_service.rb

@@ -41,7 +41,7 @@ class ExerciseUserPdfService
     # #-----正式需删掉
     # aa = File.open(Rails.root.join("public/123.html"),"w+")
     # aa.syswrite(kit.source)
-    # #正式需删掉-------
+    # #正式需删掉-------s
     file = Tempfile.new(filename)
     kit.to_pdf(file.path)
     file

app/templates/exercise_export/exercise_export.css

@@ -39,7 +39,7 @@ p{
     margin-bottom: 10px;
 }
 .mt8{
-    margin-top:8px;
+    margin-top:7px;
 }
 .mt10{
     margin-top:10px;