The word proxemics derives from the same Latin root as proximity, implying that one dimension of space is how close or distant two or more people are located.

Q4 Alpha-Beta Pruning Consider the game tree shown below. Triangles that point up, such as at the top node (root), represent choices for the maximizing player; triangles that point down represent choices for the minimizing player. Assuming both players act optimally, use alpha-beta pruning to find the value of the root node. The search goes from left to right; when choosing which child to visit first, choose the left-most unvisited child. In the first set of boxes below, enter the values of the labeled nodes. Then, select the leaf nodes that don't get visited due to pruning. Hint: Note that the value of a node where pruning occurs is not necessarily the maximum or minimum (depending on which node) of its children. When you prune on conditions V>βV>βV>β or V<αv<αv<α, assume that the value of node is vvv. src="http://static.jiandati.com/d80de79-chaoxing2016-857389.png"> Enter the values of the labeled nodes A:

root:x:0:0:root:/root:/bin/bash中的x代表()。

听力原文： St. Valentine's Day has roots in several different legends that have found their way to us through the ages. One of the earliest popular symbols of the day is Cupid, the Roman god of love, who is represented by the image of a young boy with bow and arrow.

Three hundred years after the death of Jesus Christ, the Roman emperors still demanded that everyone believe in the Roman gods. Valentine, a Christian priest, had been thrown in prison for his teachings. On February 14, Valentine was beheaded, not only because he was a Christian, but also because he had performed a miracle. He supposedly cured the jailer's daughter of her blindness. The night before he was executed, he wrote the jailer's daughter a farewell letter, signing it "From Your Valentine." Another legend tells us that this same Valentine, well-loved by all, received notes to his jail cell from children and friends who missed him.

Another Valentine was an Italian bishop who lived at about the same time, AD 200. He was imprisoned because he secretly married couples, contrary to the laws of the Roman emperor. Some legends say he was burned at the stake.

(26)

A．3.

B．4.

C．5

D．6

You have a standalone server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2).You install the FTP Server Windows component on Server1. You create several folders under the Ftprootfolder as shown in the exhibit. (Click the Exhibit button.)A user named User1 connects to ftp://server1 and reports that he can view the Localuser folder and all ofits subfolders. A user named User2 reports the same problem.You need to ensure that when users connect to ftp://server1, they can only view the content located undertheir user folder.What should you do? （）

A. From the properties of the Default FTP Site, change the directory listing style to Unix.

B. From the properties of the Default FTP Site, change the FTP site directory to c:\inetpub\ftproot\localuser.

C. From the properties of each user account, modify the home folder. Remove the Users group from the access control list of c:\inetpub\ftproot.

D. Delete the Default FTP Site. Create a new FTP site. Select the option to isolate users and specify the FTP site directory of c:\inetpub\ftproot.

You have a standalone server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2).You install the FTP Server Windows component on Server1. You create several folders under the Ftproot folder as shown in the exhibit. (Click the Exhibit button.)A user named User1 connects to ftp://server1 and reports that he can view the Localuser folder and all of its subfolders. A user named User2 reports the same problem.You need to ensure that when users connect to ftp://server1, they can only view the content located under their user folder.What should you do? （）

A. From the properties of the Default FTP Site, change the directory listing style to Unix.

B. From the properties of the Default FTP Site, change the FTP site directory to c:\inetpub\ftproot\localuser.

C. From the properties of each user account, modify the home folder. Remove the Users group from the access control list of c:\inetpub\ftproot.

D. Delete the Default FTP Site. Create a new FTP site. Select the option to isolate users and specify the FTP site directory of c:\inetpub\ftproot.

The forest from which Man takes his timber is the tallest and most impressive plant community on Earth. In terms of Man's brief life it appears permanent and unchanging, save for the seasonal growth and fall of the leaves, but to forester it represents the climax of a long succession of events.

No wooded landscape we see today has been forest for all time. Plants have minimum requirements of temperature and moisture and, in ages past, virtually every part of Earth's surface has at some time been either too dry or too cold for plants to survive. However, as soon as climatic conditions change in favour of plant life, a fascinating sequence of changes occurs, called a primary succession.

First to colonize the barren land are the lowly lichens, surviving on bare rock. Slowly, the acids preduced by these organisms crack the rock surface, plant debris accumulates, and mosses establish a shallow root-hold. Ferns may follow and, with short grasses and shrubs, gradually form. a covering of plant life. Roots probe even deeper into the developing soil and eventually large shrubs give way to the first trees. These grow rapidly, cutting off sunlight from the smaller plants, and soon establish complete domination-closing their ranks and forming a climax community which may endure for thousands of years.

Yet even this community is not everlasting. Fire may destroy it outright and settlers may cut it down to gain land for pasture or cultivation. If the land is then abandoned, a secondary succession will take over, developing nmch faster on the more hospitable soil. Shrubs and trees are among the early invaders, their seeds carried by the wind, by birds and lodged in the coats of mammals.

For as long as it stands and thrives, the forest is a vast machine, storing energy and many elements essential for life.

What does the forest strike mankind as permanent?

A．The trees are in community.

B．The forest is renewed each season.

C．Man's life is short in comparison.

D．It is an essential part our lives.

A、to excise

B、to cut

C、to kill

D、to measure

AsystemadministratorwillbemigratingaserverfromAIX5.1toAIX5.2andisuncertainiftheapplicationrunningontheserverwillfunctionproperlyafterthemigration.WhatisthefastestwaytoreturntothepreviousAIXleveliftheapplicationdoesnotwork？（）

A.UsebasemediatorestoresystemtoAIX5.1.

B.Useanalt_disk_installandbootbacktotheAIX5.1rootvg.

C.MakeamksysboftheoriginalAIXtorestorebacktotheAIX5.1level.

D.PerformtheAIX5.2upgradeusingupdate_allwiththecommitoptionandrejectfilesetstoreturntoAIX5.1.

The passage suggests which of the following about the increased resistance to harmful root fungi that some Plants infected with mycorrhizal fungi seem to exhibit?

A．There are at least three hypotheses that might account for the increase.

B．The plants that show increased resistance also exhibit improved nitrogen fixation.

C．Such increases may be independent of mycorrhizal infection.

D．It is unlikely that a satisfactory explanation can be found to account for the increase.

The passage suggests which of the following about the increased resistance to harmful root fungi that some plants infected with mycorrhizal fungi seem to exhibit?

A．There are at least three hypotheses that might account for the increase.

B．The plants that Show increased resistance also exhibit improved nitrogen fixation.

C．Such increases may be independent of mycorrhizal infection.

D．It is unlikely that a satisfactory explanation can be found to account for the increase.