循环：switch

1. switch循环

            switch (Type)
            {
                case 1:
                    if (answerCount > 1)
                    {
                        isCorrect = false;
                        remark += "单选题只能有一个答案；";
                    }
                    break;
                case 2:
                    if (answerCount < 2)
                    {
                        isCorrect = false;
                        remark += "多选题至少需要两个答案；";
                    }
                    break;
                default:
                    break;
            }