答案

题目：__ tried to take action to stop it. 答案：The authorities 题目：__ you involved in the matter? 答案：Are 题目：All the airports in the country are working __ today. 答案：normally 题目：Are you a…

国家开放大学人文英语4形考作业单元自测8 “题目：— Have you ever been to Tokyo? 答案：No, but I hope to go there next year “题目：— How are you feeling now? 答案：Much better “题目：— How long will you be away from I…

国家开放大学人文英语4形考作业单元自测7 “题目：— Here you are, Sir. 答案：Thank you very much “题目：— May I speak to Prof . Li please? 答案：I’m afraid you’ve got the wrong number “题目：— So sorry to trouble you.…

国家开放大学人文英语4形考作业单元自测6 题目：— Are you on holiday here? 答案：No, we aren’t. We live here 题目：— Do you mind if I read the newspaper on the table? 答案：Go ahead, please 题目：— Is it going to be …

国家开放大学人文英语4形考作业单元自测5 题目：— Can you help me clear up the mess? 答案： No problem 题目：— Have a nice holiday, Ted. 答案：Thank you, and you too 题目：— How was the journey to London? 答案：It went …

国家开放大学人文英语4形考作业单元自测4 题目：— Can you tell me where I can park the car? 答案：Well, just over there 题目：— Could I talk to Prof. Lee? 答案：Yes, speaking 题目：— I’ve got a bad cold today. 答案： Oh…

国家开放大学人文英语4形考作业单元自测3 题目：- Good morning, sir. May I help you? 答案：Yes, I need some salt. 题目：– I didn’t know my identity card was needed, sir. 答案：Sorry, but that’s no excuse. 题目：Altho…

国家开放大学人文英语4形考作业单元自测2 题目：– How many languages does Peter speak? 答案：Five languages. 题目：– Something went wrong with my television last night. 答案：I’m sorry to hear that. 题目：– Would you…

国家开放大学人文英语4形考作业单元自测1 题目：– Do you think I can borrow your bike for a few hours? 答案：I’m sorry, but I really need it this afternoon. 题目：– Excuse me, could you tell the time? 答案：It’s t…

【简答题】简述液压泵的排量、理论流量和实际流量三个概念，并说明理论流量和实际流量的两者大小关系。 参考答案：液压泵是液压系统中的重要组成部分，其作用是将机械能转化为液压能，为液压系统提供压力和流量。在液压泵中，有三个重要的概念需要理解，它们是排量、理论流量和实际流量。 1.排量： 排量是指液压泵每转一转，其密封容腔的几何尺寸的变化量，通常以毫升/转（ml/r…