第28题: [单项选择]积分作用调节的最终结果是()。 A. 余差减小 B. 余差为零 C. 余差不变 D. 出现积分饱和现象 参考答案:B
第29题: [单项选择]Questions 22 to 25 are based on the conversation you have just heard. A. I have to wear the tie now. B. My shoes don’t hurt anymore. C. I have to go for the gallery now. D. My buttons are on. 参考答案:C 答案解析:[听力原文] What does the man mean by saying "I’ve run out of excuses"