第23题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard. A. Spending more money. B. Complaining to the manager. C. Fighting for them. D. Waiting for a sale. 参考答案:C 答案解析:[听力原文] What should we do if we want to protect the consumer’s right
[听前猜测] 四个选项都是动名词短语,推测
第24题: [单项选择]整流模块的作用是()。 A. 将交流电转换成直流电 B. 将直流电转换成交流电 C. 将直流电转换成直流电 D. 将交流电转换成交流电 参考答案:A