第4题: [单项选择]掘进机耙爪臂和铲板的间隙应为()。 A. 2mm B. 2.5mm C. 2~5.5mm D. 3mm 参考答案:C
第5题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. She finds they are a happy couple. B. They quarrel with some people. C. She is tired of them. D. They are very good people. 参考答案:D 答案解析:[听力原文]
M: How are your new neighbors
W: They are wonderful people. I’m happy now. I was really ti