溶剂回收塔DA408塔顶后冷温度T4036控制范围为（）

20m跨托架上弦杆的轴心压力设计值N=1217kN，采用轧制T型钢T200×408×21×21，ix= 53.9mm，iy=97.3mm，A=12 570mm2，当按轴心受压构件进行稳定性计算时，以应力形式表达的数值(N/mm2)为 ______? (提示：可按最大压力计算，不考虑因内力变化对构件平面外计算长度的影响，也不考虑单轴对称的弯扭效应影响。)

A．189.6

B．144.9

C．161.4

D．180.6

20m托架上弦杆的轴心压力设计值N=1217kN，采用轧制T型钢，T200×408×21×21，ix=53.9ram，iy=97.3mm，A=12570mm2，当按轴心受压杆件进行稳定计算时，试问，杆件最大压应力(N/mm2)，与下列何项数值最为接近? 提示：①只给出上弦最大的轴心压力设计值，不考虑轴心应力变化对杆件计算长度的影响； ②为简化计算，取绕对称轴λy代替λyz (A)189.6 (B)144.9 (C)161.4 (D)180.6

20m跨度托架上弦杆的轴心压力设计值N＝1217kN，采用轧制T型钢，T200×408×21×21，ix＝53.9mm，iy＝97.3mm，A＝12570mm2。当按轴心受压构件进行稳定性计算时，杆件最大压应力(N/mm2)与下列( )项数值最为接近。 提示：① 只给出上弦杆最大的轴心压力设计值，可不考虑轴心压力变化对杆件计算长度的影响。 ② 为简化计算取绕对称轴的λy，代替λyz。

A．189.6

B．144.9

C．161.4

D．180.6

最新发布的《水乳型沥青防水涂料》JC/T408-2005，将该类产品按性能分为( )。

A.D型

B.L型

C.H型

D.K型

A.400

B.500

C.600

D.700

下列工程建设地方标准编号中，( )属于福建省推荐性地方标准编号。

A. DBJ15-54-2007

B. DB42/408-2006

C. DBJ43/T002-2007

D. DBJ/T13-118-2010

文件datafile内容为： Sir Lancelot:837-835-8257:474 Camelot Boulevard, Bath, WY 28356:5/13/69:24500 Jesse Neal:408-233-8971:45 Rose Terrace, San Francisco, CA 92303:2/3/36:25000 Zippy Pinhead:834-823-8319:2356 Bizarro Ave., Farmount, IL 84357:1/1/67:89500 Arthur Putie:923-835-8745:23 Wimp Lane, Kensington, DL 38758:8/31/69:126000 Popeye Sailor:156-454-3322:945 Bluto Street, Anywhere, USA 29358:3/19/35:22350 Jose Santiago:385-898-8357:38 Fife Way, Abilene, TX 39673:1/5/58:95600 Tommy Savage:408-724-0140:1222 Oxbow Court, Sunnyvale, CA 94087:5/19/66:34200 Yukio Takeshida:387-827-1095:13 Uno Lane, Ashville, NC 23556:7/1/29:57000 Vinh Tranh:438-910-7449:8235 Maple Street, Wilmington, VM 29085:9/23/63:68900 请使用命令显示包含San的行。

Dear Mr. Hoff,

We are very pleased to have your order and are able to confirm that all the items required are in stock. It is a pleasure to have the opportunity of supplying you and we are quite sure you will be satisfied both with the quality of our goods and our service.

Your choice of method of payment is quite acceptable to us, and we note that this will be by irrevocable letter of credit for a sum not exceeding $ 500, valid till May 25th. When we receive confirmation of this credit from The Security (Pacific International Bank, we will make up your order and await dispatch instructions from your agent.

We assure you that this order and all further orders made will have our immediate attention.

I enclose the contract to you and you should c he ck it as soon as possible.

Yours faithfully,

Wang Gang

Contract

NO. : 347

Date: July 18, 2009

Signed at: Beijing

Sellers: China National Native Product & Animal By-Products lmport& Export Corp., Beijing Branch

Address: 408, Wuyi Road E., Beijing, China

Cable Address; "TUHSU", Beijing

Buyers: Campari Limited

Address: 17 Somerton Road, London NW2, U. K.

Cable Address: "CAMPEX WARD" London NW2

The undersigned Sellers and Buyers have agreed to close the following transactions according to the terms and conditions stipulated below.

(1) Name of goods: White Nuts

(2) Specification; First Grade

(3) Quantity; 10, 000 Kg

With 2%more or less in quantity and amount allowed at the sellers' option

(4) Unit Price: At RMB 14. 40 per Kg

(5) Total Value; RMB 144, 000

(6) Packing; In wooden cases of 20 Kg net each, wrapped with straw mats

(7) Time of Shipment; Before June 18, 2008

(8) Loading Port & Destination; From Tianjin to Hong Kong

(9) Insurance; To be effected by the Buyers

(10) Terms of Payment; By Confirmed, Irrevocable, Transferable, and Divisible letter of credit to be available by sight draft, to reach the Sellers before May 25th, 2009 and to remain valid for negotiation in Guangzhou until the 15th day after the aforesaid Time of Shipment.

(11) Shipping Mark: At the Sellers' option

(12) Quality, quantity and weight certified by the China Commodity Inspection Bureau or the Sellers, as per the former's Inspections Certificate or the latter's certificate, are to be taken as final.

The Sellers The Buyers

(signed) (signed)

Wang Gang Lightman Hoff

Why does Mr. Wang write to Lightman Hoff?

A．Mr. Wang wants to let Lightman Hoff's company make sure of the contract.

B．Mr. Wang wants to establish further business relationship with Mr. Lightman Hoff.

C．Mr. Wang wants to place an order from Lightman Hoff's company.

D．Mr. Wang wants to know whether Mr. Hoff is satisfied with the goods.

A、9.8kg;

B、78448kPa;

C、9.8t;

D、9.8N。