容量为8KB的直接映象Cache，块大小为32B，则共有（）块。

PCI总线是计算机中一种非常重要的外部总线，从数据宽度上看，PCI总线有32b、64b之分；从总线速度上分，有33MHz、66MHz两种。经过改良后的PCI-X，最高可以达到64b@133MHz，其数据传输速率为（）。

A:1.04GB/s B:2.08GB/s C:4.16GB/s D:8.32GB/s

电厂中使用的DDD—32B型仪表用于测量炉水、发电机冷却水、凝结水、化学除盐水等的（）。

A:含盐量 B:电导率 C:硅酸根

分子筛脱水再生装置的启动过程是（）
1.在上述2～3条件满足，KV阀的阀位信号经过程序确认满足系统初始条件，且PLC系统无故障时给出“PERMITSTART”灯点亮信号。
2.V—32A/BREGENS.W切换开关选择V—32A或V—32B“再生”，假如选择V—32A“再生”，则V—32B处于“脱水”，PLC程序使所有的KV阀处于“减压”开始前的“待机”状态。
3.按“START”，PLC程序从“减压”过程开始控制V—32A再生，V—32B脱水。
4.按RESET按钮，PLC控制程序完成脱水/再生工艺的初始化工作。
5.脱水、再生工艺条件满足启动要求，11—LCP1、11—LCP2调试合格后达到运行条件，合主电源开关。
6.打开进仪表柜的气源阀调节进气量使柜内气压控制在100～320PA范围内，按PDL—LCP1启动按钮，两分钟后启动防爆盘充气系统，保证气系统满足使用要求。

A:①②③④⑤⑥ B:③②①⑤④⑥ C:⑤⑥③②④① D:⑤⑥④①②③

某计算机存储器按字节编址，虚拟（逻辑）地址空间大小为16MB，主存（物理）地址空间大小为1MB，页面大小为4KB；Cache采用直接映射方式，共8行；主存与Cache之间交换的块大小为32B。系统运行到某一时刻时，页表的部分内容和Cache的部分内容分别如题44-a图、题44-b图所示，图中页框号及标记字段的内容为十六进制形式。 请回答下列问题。 （1）虚拟地址共有几位，哪几位表示虚页号？物理地址共有几位，哪几位表示页框号（物理页号）？ （2）使用物理地址访问Cache时，物理地址应划分成哪几个字段？要求说明每个字段的位数及在物理地址中的位置。 （3）虚拟地址001C60H所在的页面是否在主存中？若在主存中，则该虚拟地址对应的物理地址是什么？访问该地址时是否Cache命中？要求说明理由。 （4）假定为该机配置一个4路组相联的TLB，该TLB共可存放8个页表项，若其当前内容（十六进制）如题44-c图所示，则此时虚拟地址024BACH所在的页面是否在主存中？要求说明理由。

信用证： LETTER oF CREDIT SEQUENCE OF TOTAL *27: 1/1 FORM OF DOCUMENTARY *40A: IRREVOCABLE DOC CREDIT NUMBER *20: 33423444 DATE OF ISSUE 31C: 20090830 DATE AND PLACE OF EXPIRY *31D: 20091025 CHINA APPLICANT *50: TKAMLA CORPORATION 6-7, KAWARA MACH OSAKA, JAPAN BENEFICIARY *59: TIANJIN IMP. AND EXP. CO. LTD 32, JIANGUO ROAD TIANJIN, CHINA AMOUNT *32B: CURRENCY USD AMOUNT 156100 AVAIL ABLE WITH/BY *41D: ANY BANK IN CHINA BY NECOTIATION DRAFTS AT… 41C: DRAFTS AT SIGHT FOR FULL INVOICE COST DRAWEE 42A: FUJI BANK LTD PARTIAL SHIPMENTS 43P: NOT ALLOWED TRANSSHIPMENTS 43T: ALLOWED LOADING ON BOARD 44A: TIANJIN FOR TR ANSPORTATION TO… 44B: OSAKA LATEST DATE OF SHIPMENT 44C: 20090917 2．补充资料 (1)ISSUING CARRIER’S AGENT: AMR CORP (2)AIRPORT OF DEPARTURE: TIANJIN AIRPORT (3)AIRPORT OF DESTINATION: OSAKA AIRPORT (4)FLIGHT/DATE: CA921/16 SEP 2009 (5)H.S. CODE: 6109.1000 (6)SHIPPING MARKS: TKAMLA S/C NO. SH090826 JAPAN C/NO. 1-UP (7)PACKING: ONE PC IN ONE PLASTIC BAG, 12 DOZEN PACKED IN ONE CARTON CROSS WT: 24kgs/CTN NET WT: 23kgs/CTN MEASUREMENT：72cm×45 cm×22cm/CTN (8)DOCUMENT TO ACCOMPANY AIRWAY BILL: COMMERCIAL INVOICE (9)货运单号码：99961394340 二、根据已知资料缮制航空运单

[10cf35b60ec253e38435a1f49cec3eca.gif]

一、已知资料 1．信用证 SEQUENCE OF TOTAL *27: 1/1 FORM OF DOC CREDIT *40A: IRREVOCABLE DOC. CREDIT NUMBER *20: 5715255123 DATE OF ISSUE 31C: 090312 DATE AND PLACE OF EXPIRY *31D: 090615 IN CHINA APPLICANT *50: MAMUT ENTERPRISESAV TARRACONA75-4 BARCELONA. SPAIN BENEFICIARY *59： XIAMEN HONCYUN CORPORATION 223 GANXIANC ROAD XIAMEN. CHINA AMOUNT 32B: CURRENCY USD AMOUNT 25560.00 AVAIL ABLE WITH/BY 41D: ANY BANK IN CHINA BY NECOTIATION PARTIAL SHIPMENTS 43P: ALLOWED TRANSSHIPMENT 43T: NOT ALLOWED LOADING ON BOARD 44A: XIAMEN FOR TRANSPORTATION TO 44B: BARCELONA(SPAIN) LATEST DATE OF SHIPMENT 44C: 090601 DESCRIPT OF GOODS 45A: HAND TOOLS AS PER PROFORMA INVOICE NO. 56941 CFR BARCELONA DOCUMENTS REQUIRED 46A: SIGNED COMMERCIAL INVOICE, 3 FOLD PACKING LIST, 3 FOLD. FULL SET CLEAN ON BOARD OCEAN BILL OF LADING ISSUED TO THE ORDER OF SHIPPER, MARKED FREIGHT PREPAID AND NOTIFY APPLICANT. CHARCES 71B: ALL BANKING CHARGES OUTSIDE SPAIN ARE FOR ACCOUNT OF BENEFICIARY. PERIOD FOR PRESENTATION 48: DOCUMENTS MUST BE PRESENTED WITHIN 15 DAYS AFTER THE DATE OF SHIPMENT BUT WITHIN THE VALIDITY OF THE CREDIT 2．补充资料： (1)INVOICE NO. JSC096814 (2)PACKING G.W/kgs N.W/kgs MEAS/(m3) HAND TOLLS ART01: Packed in 1 wooden case of 1500 pcs each 1380/case 1730/case 0.4/case ART02: Packed in 1 wooden case of 1000 pcs each 1030/case 1020/case 0.3/case Packed in ONE 20’ CONTAINER(集装箱号：TEXU2263978) (3)唛头：HAND TOOLS BARCELONA C/NO. 1-5 (4)金发编号：JF0387458 (5)人民币账号：RMB06128614 (6)生产厂家：厦门工具厂 二、根据已知资料缮制托运单

[ac9f2c8a2992f2580edd8d689f65c31c.gif]

一、已知资料 1．信用证： LETTER OF CREDIT SEQUENCE OF TOTAL *27: 1/1 FORM OF DOCUMENTARY *40A: IRREVOCABLE DOC CREDIT NUMBER *20: 30008922 DATE OF ISSUE 31C: 20090830 DATE AND PLACE OF EXPIRY *31D: 20091025 CHINA APPLICANT *50: TKAMLA CORPORATION 6-7, KAWARA MACH 0SAKA, JAPAN BENEFICIARY *59: TIANJIN IMP. AND EXP. CO. LTD 32, JIANGUO ROAD TIANJIN, CHINA AMUNT *32B: CURRENCY USD AMOUNT 156100 AVAILABLE WITH/BY *41D: ANY BANK IN CHINA BY NEGOTIATION DRAFTS AT… 41C: DRAFTS AT SIGHT FOR FULL INVOICE COST DRAWEE 42A: FUJI BANK LTD PARTIAL SHIPMENTS 43P: NOT ALLOWED TRANSSHIPMENS 43T: ALLOWED LOADING ON BOARD 44A: TIANJIN FOR TRANSPORTATION TO… 44B: OSAKA LATEST DATE OF SHIPMENT 44C: 20090917 DESCRIPT OF GOODS 45A: 5760 PCS COTTON T-SHIRT AS PER BUYER’S SALES CONTRACT USD4.00/PC CFR OSAKA DOCUMENTS REQUIRED 46A: COMMERCIAL INVOICE ONE ORICINAL AND 2 COPIES PACKING LIST IN ORIGINAL AND 2 COPIES 2．其他资料： (1)ISSUING CARRIER’S AGENT: AMR CORP (2)AIRPORT OF DEPARTURE: TIANJIN AIRPORT (3)AIRPORT OF DESTINATION: OSAKA AIRPORT (4)FLIGHT/DATE: CA921/16 SEP 2009 (5)H. S. CODE: 6109.1000 (6)SHIPPING MARKS: TKAMLA S/C NO. SH030826 OSAKA C/NO. 1-UP (7)PACKING: ONE PC IN ONE PLASTIC BAG, 12 DOZEN PACKED IN ONE CARTON GROSS WT. : 24kgs/CTN NET WT. : 23kgs/CTN MEASUREMENT: 72cm×45cm×22cm/CTN (8)DOCUMENT TO ACCOMPANY AIRWAY BILL: COMMERCIAL INVOICE 二、根据已知资料缮制航空托运单   中 国 民 用 航 空 局 THE CIVIL AVIATION ADMINISTRATION OF CHINA 国 际 货 物 托 运 书 SHIPPER’S LETTER OR INSTRUCTION

中 国 民 用 航 空 局 THE CIVIL AVIATION ADMINISTRATION OF CHINA 国 际 货 物 托 运 书 SHIPPER’S LETTER OR INSTRUCTION [1a57192cd6057cd4fa4d9dbec5cb6c61.gif]

IP数据报的报头长度应当是32b的整数倍，如果不是，需要填充域加______凑齐。