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涵洞顶面填土压实厚度大于50cm时，方可通过重型机械和汽车。
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[听力原文]8-10M: I wonder if you can help me.W: I’d be glad to.M: I’ve just arrived and I’m not used to the time difference here. I don’t want to be a late sleeper be cause I like to take a walk in the early morning.W: I see. You’re from the United States, aren’t youM: Yes, I’m from New York.W: Beijing time is 13 hours ahead of New York.M: Oh, I see. That’s very kind of you to give me the information. I’d have no idea about it without your help.W: My pleasure. You must be tired after a long flight. So you’d better have a good rest. It takes time to recover from a jetlag.M: That’s very considerate of you. But would you please wake me up at 5 Beijing Time tomorrow morningW: Yes, sir. No problem. What does the woman suggest the man do（）
You have made my life so (misery)（）that I cannot put up with you anymore.
University Physics is intended for students of science and engineering. Primary emphasis is on physical principles and problem- (46) ; historical background and specialized practical applications have been given a place of (47) importance. Many worked-out examples and an extensive collection of problems are included within each chapter.In this (48) edition, the basic philosophy and outline and the balance between depth of treatment and (49) of subject-matter coverage are unchanged from previous editions. We have tried to preserve those features that users of (50) editions have found desirable, (51) incorporating a number of changes that should enhance the book’s usefulness.The textbook is adaptable to a wide variety of (52) outlines. The entire textbook can be used for a(n) (53) course two or three semesters in length. For a less intensive course, many instructors will want to (54) certain chapters or sections to tailor the book to their individual needs. The arrangement of this edition facilitates this kind of (55) 53（）
在灌砂法测定中，测定层表面较粗糙，而操作中没有在测点放置基板测定m6（对基板与粗糙面间空隙灌砂后，灌砂筒内砂的质量），而直接凿挖试坑并灌砂测定m4（对试坑灌砂后，灌砂筒内剩余砂的质量），试分析这样做对测定结果会产生怎样的影响为什么？
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