代码

好的，这是一个比较复杂的系统，需要涉及到多个模块和技术。以下是一个大致的代码框架：

1. 题库模块：包括题目的存储、随机抽取、答案校验等功能。

class Question:
    def __init__(self, prompt, options, answer):
        self.prompt = prompt
        self.options = options
        self.answer = answer

class QuestionBank:
    def __init__(self):
        self.questions = []  # 存储题目的列表

    def add_question(self, question):
        self.questions.append(question)

    def get_random_questions(self, num):
        return random.sample(self.questions, num)

    def check_answer(self, question, answer):
        return question.answer == answer

2. 考试模块：包括考试时间、答题过程管理、终止考试等功能。

class Exam:
    def __init__(self, question_bank, time_limit_in_minutes):
        self.question_bank = question_bank
        self.time_limit = time_limit_in_minutes * 60
        self.start_time = None
        self.end_time = None
        self.questions = None
        self.answers = None
        self.score = None

    def start_exam(self):
        self.questions = self.question_bank.get_random_questions(100)
        self.answers = [None] * len(self.questions)
        self.start_time = time.time()
        self.end_time = self.start_time + self.time_limit

    def answer_question(self, index, answer):
        self.answers[index] = answer

    def submit_exam(self):
        self.end_time = time.time()
        self.score = 0
        num_answered = 0
        num_correct = 0
        num_wrong = 0
        num_unanswered = 0
        for i in range(len(self.questions)):
            if self.answers[i] is not None:
                num_answered += 1
                if self.question_bank.check_answer(self.questions[i], self.answers[i]):
                    num_correct += 1
                    self.score += 1
                else:
                    num_wrong += 1
                    self.score -= 11
                    if num_wrong >= 11:
                        self.end_time = time.time()
                        break
            else:
                num_unanswered += 1
        return {
            'score': self.score,
            'num_correct': num_correct,
            'num_wrong': num_wrong,
            'num_unanswered': num_unanswered,
            'time_taken': self.end_time - self.start_time,
            'num_answered': num_answered
        }

3. 用户界面模块：包括用户输入、界面显示、交互等功能。

class UserInterface:
    def __init__(self, exam):
        self.exam = exam

    def start(self):
        self.exam.start_exam()
        while True:
            self.show_question()
            answer = self.get_answer()
            if answer == 'submit':
                result = self.exam.submit_exam()
                self.show_result(result)
                break
            else:
                self.exam.answer_question(self.current_question_index, answer)
                self.current_question_index += 1
                if self.current_question_index >= len(self.exam.questions):
                    self.current_question_index = 0

    def show_question(self):
        question = self.exam.questions[self.current_question_index]
        print(question.prompt)
        for i, option in enumerate(question.options):
            print(f'{i+1}. {option}')

    def get_answer(self):
        while True:
            answer = input('请输入答案，或输入"submit"交卷：')
            if answer.isdigit() and int(answer) in range(1, 5):
                return int(answer) - 1
            elif answer.lower() == 'submit':
                return 'submit'
            else:
                print('答案不合法，请重新输入')

    def show_result(self, result):
        print('考试结束，统计结果如下：')
        print(f'总分：{result["score"]}')
        print(f'答对题数：{result["num_correct"]}')
        print(f'答错题数：{result["num_wrong"]}')
        print(f'未答题数：{result["num_unanswered"]}')
        print(f'用时：{result["time_taken"] / 60} 分钟')

这里只是提供了一个大致的框架，实际上还需要考虑很多细节，比如如何读取题库文件、如何处理用户输入错误、如何将结果保存到数据库等等。如果您有具体的问题或需要更详细的代码，可以再告诉我。