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流体层流流动时,摩擦系数既与雷诺数有关,也与管壁粗糙度有关。
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Conversation One (Questions 1-4)• Look at the note below.• You will hear a man making a call about a delivery.Telephone MessageTo: John WhiteDate:19/10/00Patrick Fisher rang to say our new (1)........................................................ would be deliveredtomorrow. You need to tell Sarah Robbins, the (2)......................................., where to (3).................................................. them.Please phone Mr. Fisher on (4)................................................................. if there are any problems.Conversation Two (Questions 5-8)• Look at the note below.• You will hear a man telephoning his personnel officer.MessageDate: 12 November 00From: Roshan Singh, (5) .......................................................... Department.Message: He has received an interesting job (6) ..................................and wants to discuss his (7)...............................................He has to reply by (8) ................................................morning range.Conversation Three (Questions 9-12)• Look at the note below.• You will hear a woman calling a company about a possible order.TELEPHONE ENQUIRY RECORDCaller: Julie Ventnor from Polareach LtdShe's interested in our (9) ...........................................................Requires details of our (10) ......................................... termsTotal monthly order, approx. (11) £...........................................................Meeting on: 30th (12) ............................................................
A: Something so irritating happened recently with a delivery that I’d ordered. I certainly won’t be using the supplier again.B: 1 ?A: Well, I work from home as a translator for a leading bank. My printer had broken, and I needed a new one urgently. The person who took my order was extremely friendly and promised it would be there the next day.B: OK.A: Mm-hm. It didn’t arrive, and I had waited in all day to receive it! When I phoned the supplier, I got the same friendly, helpful treatment again – they were very sorry, it would definitely be there the following day. But they 2. This went on for the rest of the week.B: 3!A: I was very put out indeed. It was all talk and no action.
某公司出口产品共100箱，该商品的内包装为塑料袋，每袋重1磅，外包装为纸箱，每箱100袋，箱的尺寸为47 x 39×26(立方厘米)，经查该商品为5级货，运费计收标准为“M”。5级货，每运费吨的基本运费为367港元，另加转船费l5％，燃料费33％，港口拥挤费5％。问：该货物的运费是多少?
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