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单选题
The energy associated with molecules is known as （）.
A
kinetic energy
B
potential energy
C
mechanical energy
D
thermal energy
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第一篇Immune FunctionsThe immune system is equal in complexity to the combined intricacies of the brain and nervous system. The success of the immune system in defending the body relies on a dynamic regulatory communication net- work consisting of millions and millions of cells.Organized into sets and subsets,these cells pass information back and forth like clouds of bees flying around a hive（蜂巢）.The result is a sensitive system of checks and balances that produces an immune response that is prompt,appropriate,effective,and self-limiting.At the heart of the immune system is the ability to distinguish between self and nonself. When immune defenders encounter cells or organisms carrying foreign or nonself molecules,the immune troops move quicklyto eliminate the intruders（人侵者）.Virtually every body cell carries distinctive molecules that identify it as self. The body's immune defenses do not normally attack tissues that carry a self-marker. Rather,immune cells and other body cells coexist peaceably in a state known as self-tolerance.When a normally functioning immune system attacks a nonself molecule,the system has the ability to"remember"the specifics of the foreign body.Upon subsequent encounters with the same species of molecules,the immune system reacts accordingly. With the possible exception of antibodies（抗体）passed during lactation（授乳期）, this so called immune system memory is not inherited.Despite the occurrence of a virus in your family,your immune system must"learn"from experience with the many millions of distinctive nonseif molecules in the sea of microbes（微生物）in which we live. Learning entails producing the appropriate molecules and cells to match up with and counteract each nonseif invader.Any substance capable of triggering an immune response is called an antigen（抗原）.Antigens are not to be confused with illergens（过敏原）,which are most often harmless substances that provoke the immune system to set off the inappropriate and harmful response known as allergy.An antigen can be a virus,a bacte-rium,or even a portion or product of one of these organisms.Tissues or cells from another individual also act as antigens,because the immune system recognizes transplanted tissues as foreign,it rejects them.The body will even reject nourishing proteins unless they are first broken down by the digestive system into their primary,nonantigenic building blocks.An antigen announces its foreignness by means of intricate and charac- teristic shapes called epitopes（抗原表位）, which protrude（突出）from its surface. Most antigens , even the simplest microbes,carry several different kinds of epitopes on their surface;some may even carry several hundreds.Some epitopes will be more effective than others at stimulating an immune response.Only in abnormal situations does the immune system wrongly identify self as nonself and execute a misdirected immune attack.The immune cells and other cells in the body coexist peaceably in a state known as________.A:self-toleranceB:balanceC:harmonyD:tolerance
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共用题干
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共用题干
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考题
What is the purpose of the inverse ARP？（）A、to map a known DLCI to an IP addressB、to map a known IP address to a MAC addressC、to map known SPID to a MAC addressD、to map a known DLCI to a MAC addressE、to map a known IP address to a SPIDF、to map a known MAC address to an IP address
考题
Which well-known community prevents a BGP speaker from announcing the associated prefix to itsinternal peers?（）A、no-exportB、no-advertiseC、no-readvertiseD、no-export-subconfed
考题
Choose the two correct statements regarding Oracle WebLogic Server（）A、 a server instance can be associated with multiple machinesB、 a machine can be associated with multiple server instance C、 a server instance can be associated with only a single machine D、 a machine can be associated with only one server instance
考题
What is the purpose of the inverse ARP?（）A、to map a known DLCI to an IP addressB、to map a known IP address to a MAC addressC、to map known SPID to a MACaddressD、to map a known DLCI to a MAC addressE、to map a known IP address to a SPIDF、to map a known MAC address to an IP address
考题
A customer wants to monitor energy consumption for all of their IBM systems. What part of the IBM Systems Director family supports this function?（）A、Active Energy ManagerB、PowerVM Energy ManagerC、Power and Energy ManagerD、Thermal and Energy Manager
考题
A customer is concerned about the high energy cost associated with their data center. Specifically， their concern focuses on the cooling cost of many hundreds of servers. You have a meeting with the CIO and CFO to propose a solution. How would you prepare yourself for the meeting？ （）A、Since their capacities and usage models vary， ask the customer to turn off some of the servers during off-peak and low demand time.B、Investigate their expansion plans and suggest to the customer the removal of some of their servers to another location and retirement of the older servers.C、Contact the CFO to find out the targeted energy savings of the company and propose to the customer the purchase of a more efficient cooling system.D、Contact the CIO for a list of servers and type/model numbers. Complete a proposal outlining the savings on energy cost by deploying an IBM BladeCenter solution and total cost of ownership and return on investment.
考题
单选题Which well-known community prevents a BGP speaker from announcing the associated prefix to itsinternal peers?（）A
no-exportB
no-advertiseC
no-readvertiseD
no-export-subconfed
考题
单选题According to the text, incomplete combustion is more likely to occur with gasoline than with an alternative fuel because ______.A
the combustion of gasoline releases photochemical active hydrocarbonsB
the combustion of gasoline embraces an intricate set of reactionsC
gasoline molecules have a simple molecular structureD
gasoline is composed of small molecules
考题
单选题（）, the motion would continue indefinitely once it had started.A
Were there loss of energy by frictionB
Since there be loss of energy by frictionC
Were there no loss of energy by frictionD
Should be no loss of energy by friction
考题
单选题A centrifugal pump produces flow with a resulting discharge head by energy conversionIt is typical for the energy conversion to follow the order of （）.A
mechanical energy to kinetic energy to potential energyB
mechanical energy to potential energy to kinetic energyC
potential energy to mechanical energy to kinetic energyD
kinetic energy to mechanical energy to potential energy
考题
多选题Choose the two correct statements regarding Oracle WebLogic Server（）Aa server instance can be associated with multiple machinesBa machine can be associated with multiple server instanceCa server instance can be associated with only a single machineDa machine can be associated with only one server instance
考题
单选题Production of complex molecules is accomplished by replication.A
duplicationB
synthesisC
fixationD
reproduction
考题
单选题Deck machinery, which is also known as hull machinery, includes all power driven equipment located （）the machinery spaces that is （） with the main propulsion plant.A
inside；associatedB
inside；not associatedC
outside；associatedD
outside；not associated
考题
单选题The form of cloud often known as mackerel sky which is generally associated with fair weather is（）.A
nimbostratusB
stratusC
cirrocumulusD
cumulonimbus
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