下列选项中,说法正确的是( )。 A.802.11b的运作模式基本上分为端对端模式

题型:单项选择题

问题:

下列选项中,说法正确的是( )。

A.802.11b的运作模式基本上分为端对端模式和基本模式两种
B.基本模式是指无线网卡和无线网卡之间的通信方式
C.端对端模式是指无线网络规模扩充或无线和有线网络并存时的通信方式
D.基本模式是802.11b最常用的方式

考点:计算机等级考试网络工程师计算机网络工程师
题型:单项选择题
完形填空
Middle school days are both fun and busy. Students spend __1__their teachers. Students spend their days in class, ___2__to the interesting or boring words of their teachers. At break(休息时间), they __3__ themselves by running or talking with each other. But ___4_should students spend their__5__time after school?
In western countries,___6_is normal(很正常的) for students to have a part-time _7_after school or on weekends. Students can make their _8_ money and learn more about the “__9_world”. They enjoy the independence(独立) and money, and their parents enjoy the __10_house. However, it seems that, in China, parents__11__so much about their children’s studies that they would like to _12_ their children spending most of their time _13__for all those exams. It is natural for Chinese parents to feel that way, but I think everything should keep balanced. Sometimes, western school children__14__long hours after school to make money, so they__15__too tired to listen in class or do their homework. But Chinese students spend so much time on their studies that anything else becomes less important.
小题1:
A.inB.onC.withD.for
小题2:
A.addingB.gettingC.replyingD.listening
小题3:
A.helpB.takeC.relaxD.look
小题4:
A.whatB.howC.whenD.which
小题5:
A.busyB.littleC.pastD.free
小题6:
A.thisB.thatC.itD.such
小题7:
A.activityB.jobC.programD.plan
小题8:
A.richB.anyC.ownD.some
小题9:
A.realB.poorC.publicD.small
小题10:
A.bigB.quietC.noisyD.modern
小题11:
A.dealB.worryC.causeD.concentrate
小题12:
A.makeB.askC.letD.see
小题13:
A.chattingB.studyingC.succeedingD.obeying
小题14:
A.spendB.solveC.regardD.work
小题15:
A.faceB.realizeC.achieveD.become
题型:单项选择题

出现的不溶于血液的异常物质,随血流运行阻塞管腔的现象称为()

A.血液凝固

B.血栓形成

C.栓塞

D.梗死

E.血栓栓子

题型:单项选择题

下列属于肺癌局部扩展症状的是()

A.呼吸困难

B.咳嗽

C.声音嘶哑

D.喘鸣

E.胸闷

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咯吐脓血腥臭痰者属()。

A.寒痰

B.湿痰

C.燥痰

D.热痰

E.肺痈

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甲氨蝶呤影响核酸合成的机制是()。

A.抑制核苷酸还原酶

B.抑制DNA多聚酶

C.抑制二氢叶酸还原酶

D.阻止嘌呤核苷酸形成

E.抑制脱氧胸苷酸合成酶

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