下列关于临界区叙述正确的是( )。A.进程中访问临界资源的那段程序称为临界区 B

题型:单项选择题

问题:

下列关于临界区叙述正确的是( )。

A.进程中访问临界资源的那段程序称为临界区

B.临界区最多允许两个进程进入

C.进程进入临界区的要求可以在无限的时间内得到满足

D.系统中一些资源一次只允许有限的进程使用,称之为临界资源

考点:计算机等级考试PC技术计算机三级(PC技术)7
题型:单项选择题
完形填空(共15小题;每小题1分,满分15分)
46 blind, deaf, unable to walk or use your hands easily is something that most people can’t imagine. But many people ­­47  these challenges 48  Liz Smith. Liz can’t use her arms or legs well, and normal things like answering the telephone,opening and 49  the door or carrying things have always been difficult for her.Then one day last year,a friend of her said that she would like to help her out. She talked to “Animal Helpers ” to see if it would be possible for her to get a specially 50  dog.
51  six months of training with a dog at “Animal Helpers”, Liz smith was able to 52  him home. Her dog’s name is “Lucky” --- a good name for him 53  Liz feels lucky to have him.
54 does Lucky help her? Well, he has been trained to understand many different 55 .For example, when Liz says, “Lucky, fetch my book!” and he 56 at once. He is very clever and understands many English words ,57  some difficult 58  like “upstaris”.
“Animals Helpers” is an organization 59  to help disabled people .60 is very important that it doesn’t run out of money. The donation is greatly appreciated and the money is well used to help disabled people like Liz.
小题1:
A.To beB.BeingC.BeD./
小题2:
A.who faceB.faceC.are faceD.faced
小题3:
A.such as   B.likes   C.like  D.for example
小题4:
A.shuting   B.closing  C.shut   D.close
小题5:
A.trainedB.train    C.trainingD.trains
小题6: A. With      B After.      C. Before    D. Because
小题7:
A.fetch   B.take  C.carry  D.return
小题8:
A.and    B.but   C.or D.because
小题9:
A.When   B.HowC.Where.D.Why
小题10:A information  B conclusions  C. experience  D. instructions 
小题11:
A.does it   B.fetch itC.does D.fetches
小题12:
A.even   B.and C.like D.but
小题13:
A.words B.word C.onesD.one
小题14:
A.sets up B.set up C.that set upD.which set up
小题15:
A.That B.It  C.He D.She
题型:单项选择题

列夫·托尔斯泰说过:“理想是指路明灯。没有理想就没有坚定的方向;没有方向,就没有生活。”这段话说明[ ]

①只要树立理想就能获得成功

②树立人生理想的重要性

③理想是人精神活动的全部

④理想对人生的牵引作用

A.①②

B.②③

C.①④

D.②④

题型:单项选择题

常用实验动物,无呕吐反射的动物是()。

A.兔

B.猫

C.犬

D.猴

题型:单项选择题

特种清洗还需要()剂和除油剂。

A.除水

B.除锈

C.清洁

D.清洗

题型:单项选择题

被审计单位2007年利润总额有较大增长,以下各种情况下利润存在舞弊的事项可能有()

A.被审计单位利润总额主要取决于子(分)公司利润

B.被审计单位资产负债率有所下降

C.结账日后发生大量销售退回

D.被审计单位的主要竞争对手之一宣布破产

E.抽查销售发票,并没有找到当年12月份发货业务的运输凭证

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