四率工具类

sexam/src/main/java/com/xhkjedu/sexam/utils/ExamUtil.java

         if (scorerate != null) {
             if (scorerate >= 85) {
                 ratetype = 1;
-            } else if (scorerate < 85 && scorerate >= 70) {
+            } else if (scorerate >= 70) {
                 ratetype = 2;
-            } else if (scorerate < 70 && scorerate >= 60) {
+            } else if (scorerate >= 60) {
                 ratetype = 3;
             }else if(scorerate < 60 && scorerate > 40){
                 ratetype = 4;