final1 功能修复基本无误，开始测试bug

src/mathpuzzle/service/JuniorHighGenerator.java

@@ -24,11 +24,18 @@ public class JuniorHighGenerator implements QuestionGenerator {
 
     private String generateSingleQuestion() {
         List<String> parts = new ArrayList<>();
-        int operandCount = random.nextInt(4) + 2;
+        int operandCount = random.nextInt(5) + 1;
         parts = generateBase(operandCount, parts);
         // hasAdvancedOp用以检测下面的循环是否加入了高级运算符，如果没有就启动保底
         boolean hasAdvancedOp = false;
-        if (operandCount > 2 && random.nextBoolean()) {
+        if (operandCount == 1) {
+            if ("平方".equals(ADVANCED_OPS[random.nextInt(ADVANCED_OPS.length)])) {
+                parts.add("平方");
+            } else {
+                parts.set(0, "开根号" + parts.get(0));
+            }
+            hasAdvancedOp = true;
+        } else {
             // 遍历查找左括号的合理位置
             for(int i = 0; i < parts.size() - 2; i++) {
                 // 该位置要为操作数且随机添加括号