第12题: [单项选择]What does the woman want to have A. A story-book. B. A piece of paper. C. An English book. 参考答案:B 答案解析:[听力原文] W: Excuse me. May I have a piece of paper, please M: Certainly, here you are.
第13题: [单项选择]电瓶是唯一的电源时,将电瓶电门关掉;下面哪句话是对的() A. 电瓶汇流条和直流汇流条的电源被断开 B. 转换的热电瓶汇流条和直流汇流条的电源被断开 C. 备用直流汇流条和静变流机的电源被断开 D. 上述A、B和C 参考答案:C