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Which of the following commands can be issued without interfering with the operation of loop guard？（）
A . Switch（config-if）#spanning-tree guard root
B . Switch（config-if）#spanning-tree portfast
C . Switch（config-if）#switchport mode trunk
D . Switch（config-if）#switchport mode acce
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下列（）不是Oracle Data Guard中的运行模式。
A . MAXIMI ZEPROTECTION
B . MAXIMI ZEPERFORMANCE
C . MAXIMI ZEAVAILABILITY
D . MAXIMI ZESTANDBY
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A Power 770 customer needs to add additional I/O adapters. There is no room for the cards， so an I/O drawer must be added. What resource will help identify supported I/O drawers and the maximum number of drawers permitted per loop？（）
A . I/O Planning Guide
B . Power Systems data sheet
C . Power Systems Facts and Features
D . Run FLRT to recommend I/O feature
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While deploying a new switch， you accidently connect ports 3/12 and 3/18 together， creating a loop. STP detected it and placed port 3/18 in blocking mode. Why did STP not place port 3/12 in blocking mode instead？ （）
A . Port 3/12 was already up and forwarding before the loop was created.
B . Port priority is based on lowest priority and lowest port number.
C . You connected the wire on port 3/18 last.
D . None of the above， it is purely random.
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Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.
A . Alert the watch officer that a vessel is approaching the preset CPA limit
B . Warn of small targets that are initially detected closer than the outer guard zone
C . Guard against target loss during critical maneuvering situations
D . Sound an alarm for targets first detected within the zone
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The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, （） is collected and returned back to the boiler for heating up again to steam.
A . the former
B . the first
C . the latter
D . the last
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Coast Guard approved buoyant work vests（）.
A . may be substituted for 10 percent of the required life preservers
B . should be stowed adjacent to lifeboats and emergency stations
C . may be used by boat crews and line handlers during lifeboat drills
D . should be used when carrying out duties near a weather deck's edge
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Which configuration is used to enable root guard？（）
A . interface gig3/1 spanning-tree guard root
B . interface gig3/1 spanning-tree root guard
C . interface gig3/1 spanning-tree root-guard
D . interface gig3/1 spanning-tree root-guard default
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Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？ （）
A . Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot
B . UDLD protects against STP failures caused by cabling problems that create one-way links.
C . Loop guard detects and protects against duplicate packets being received and transmitted on different ports
D . UDLD protects against unidirectional cabling problems on copper and fiber media.
E . Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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That uniform makes the guards look absurd.
A . serious
B . ridiculous
C . beautiful
D . impressive
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Which two statements are true about BPDU port-guard and BPDU filtering？（）
A . BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis.
B . When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.
C . When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.
D . When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state.
E . When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state.
F . When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.
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Switch R1 has been configured with the root guard feature. What statement is true if the spanning tree enhancement Root Guard is enabled？ （）
A . If BPDUs are not received on a non-designated port， the port is moved into the STP loop- inconsistent blocked state
B . IF BPDUs are received on a PortFast enabled port， the port is disabled.
C . If superior BPDUs are received on a designated port， the interface is placed into the root- inconsistent blocked state.
D . If inferior BPDUs are received on a root port， all blocked ports become alternate paths to the root bride.
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有20个单字节的有符号数，存放在以内存NUM1单元为首地址的存储区中，要求将其取绝对值后，存人到以内存NUM2为首地址的存储区中。请填写下面程序，完成指定功能。 MOV SI，OFFSET NUM1；置源地址指针 MOV DI，OFFSET NUM2；置目的地址指针 MOV CX，（） LP:MOV AL，（） AND AL，（） JNS（） NEG（） NEXT:MOV[DI]，AL （）SI INC（） LOOP（） INT 3
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While deploying a new switch， you accidently connect ports 3/12 and 3/18 together， creating a loop. STP detected it and placed port 3/18 in blocking mode. Why did STP not place port 3/12 in blocking mode instead？（）
A . Port 3/12 was already up and forwarding before the loop was created.
B . Port priority is based on lowest priority and lowest port number.
C . You connected the wire on port 3/18 last.
D . None of the above， it is purely random.
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52. Your ARPA has two guard zones. What is the purpose of the inner guard zone?
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The security guards knew how to control the crowd.
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听力原文：The Coast Guard does what its name says; it guards the coasts of the United State
听力原文： The Coast Guard does what its name says; it guards the coasts of the United States. During a war, the Coast Guard becomes part of the United States Navy, and helps to protect against enemy attacks. In times of peace, however, The Coast Guard is part of the United States Department of Transportation. It has responsibility for many different duties. The Coast Guard can be found at many large lakes in America, as well as in coastal waters. It enforces laws controlling navigation, shipping, immigration, and fishing. It enforces other laws that affect the thousands of privately-owned boats in the United States. Coast Guard planes, boats and helicopters search for missing boats and rescue people in dangerous situations. Last year, Coast Guards men saved the lives of almost 7,000 people.
The Coast Guard does scientific research on the ocean. It also uses ice-breaking boats to clear ice from rivers or lakes, so boats can travel safely. One of The Coast Guard's most important duties now is helping to keep illegal drugs out of the United States. Coast Guard boats, armed with guns, use radios and radar to find boats that may be carrying drugs. They stop the boats suspected of carrying drugs and search them, They seize the drugs and arrest the people on the boats. Last year, Coast Guardsman seized more than 800,000 kilo grams of marijuana and cocaine. And-they arrested more than 700 persons trying to bring illegal drugs into the United States.
This kind of action is exiting. Most of the time, however, Coast Guardsman say they see nothing more exciting than the ocean.
(33)
A．Guarding the coasts of the United States.
B．Being part of the United States Navy.
C．Guiding people along the coast.
D．Protecting people from army attack.
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为了使下面的程序段能用来把DL中的二进制代码从高位到低位依次转换为ASCII码并存入 DI 设定的内存数据区，试问该程序段中NEXT 处应填入()指令。 MOV CX，8 NEXT： MOV AL， DL AND AL， 1 ADD AL， 30H MOV [D1]，AL INC DI LOOP NEXT
A．SHL DL, 1
B．SHR DL，1
C．ROL DL，1
D．ROR DL，1
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听力原文： Susan Ford, the 21-year-old blonde daughter of the former President, is engaged to Charles Frederick Vance, 37, Secret agent assigned to the detail guarding the family, and they will be married in June, it was announced Wednesday.
When will the couple be married？
A．This July.
B．Next June.
C．This June.
D．This Wednesday.
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The presence of armed guards usfrom doing anything disruptive（).
A.excited
B.irritated
C.prevented
D.encourage
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“You can’t imagine what a crazy girl Sarah is! She is prepared to risk across the Sahara Desert without a guide and_____ without an armed guard!"“That’s not true She’s changed her. mind”
A.to travel...be attacked
B.of trave...being attacked
C.for travelling...to be attacked
D.travelling...being attacked
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听力原文： Secretary of State, Condoleezza Rice, on a heavily guarded surprise trip to Iraq on Sunday, urged patience for the country' s fragile new government and said Iraqis have made remarkable political progress that can overcome a recent surge of violence.
The one-day trip was Rice's first visit to Iraq as the nation's top diplomat. Rice was a chief architect of the U.S.-led invasion of Iraq as White House national security adviser during President Bush's first term and she accompanied Bush on his own surprise visit to Iraq on Thanksgiving Day 2003.
Rice told reporters that she wanted to discuss the new government' s upcoming tasks including writing a constitution, as well as addressing the country's security and infrastructure needs.
From the news item, we are sure this was at least Rice's ______ trip to Iraq.
A．first
B．second
C．third
D．fourth
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guarded（）
A．教学的，教育学的
B．人为的，不自然的，虚假的
C．详细阐述，详细解释
D．吵闹的，喧嚷的
E．有保留的，谨慎的
F．无争议的无人反对的
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4、发球后正手抢拉的结合技术是比赛中前三板技术中最具 和杀伤力的技术。 “Forehand loop after serve” is the most and lethal technique in the first three strokes.
