局域网常用的拓扑结构有星型、环型、 【2】 和树型等几种。

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问题:

局域网常用的拓扑结构有星型、环型、 【2】 和树型等几种。

考点:计算机等级考试数据库技术三级数据库技术笔试309
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防火墙是防范措施的总称,是一种有效的______,他可以阻挡对内、对外的非法访问和不安全的数据传递。

A.防护墙

B.网络安全模型

C.隔离带

D.保护网

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信息匹配。

    阅读下列应用文及相关信息,并按照要求匹配信息。

    请阅读下面出现在英国报刊的有关课程招生的广告信息:

     A. MATHEMATICS, English, Science & more. All ages. Ring Paul 9905-9995

     B. MATHS tutoring in your home. All high school levels or above. Yr7-12, $50-60ph. Contact

          Andrew 041 8-4116-3 83, or email Andrew-bb@yahoo.com.au

     C. MONA VALE Education Centre. All subjects, levels, abilities. Small groups/individual, esp.

          for youngkids. Ph 9918-0011

     D. NEWPORT Education Centre. Professional tutoring in Maths, English, Reading, Spelling. 

          Years 1 to 12.Free assessment. Sharyn Whitton 9979 9421

     E. Accelerated MIND BODY SOUL NATURAL HEALING Private Courses/ Programs

         Heal Yourself / Help Others REIKI 1 2 3 ORION/THETAHEALING *HELEN

         WENHAN 5591-6677*

     F. Acrylic Nail Courses and Waxing Courses (including Brazilian) Day Course Begins FOR

        ACRYLIC NAILS Tuesday 31st Oct. Evening Course 6th November WAXING COURSE

        Starts every-Monday FULLY ACCREDITED Bookings Essential Limited Numbers! 

        Ph.5596~7998

     请阅读下面的学习者信息,然后匹配符合他们要求的学习课程

     1. John, a fourteen-year-old young boy, is poor at math and physics and has to improve them in order

to pass the final exam at school.

     2. Mr. Black Smith, a labor worker on dock who would like to change to some technological job

since he is already 43 and a bit too old for hard labor work. He has to work from Monday to Saturday

but is free after 5:00 in the afternoon.

     3. Chen Hua, a Chinese middle school student who has just moved to the USA. She will have to finish

the course all in English at school there but her English is not good enough.

     4. Tim, a graduated college student who wanted to quit his job and go on his study for M. A. He

planned to take the MBA courses and would ha've to improve his math because he majored in Art at

college.

     5. Mrs. Tumer, a working mother with two young kids. She thinks education is a race and it's better

to prepare kids more and earlier. Her neighbors, several other families share the same opinion and they

are all thinking about sending their young kids to some pre-school education program.

题型:填空题

关于日本自然资源的叙述正确的是

A.河流短小,缺乏水能

B.石油可满足国内需要

C.矿产贫乏,森林丰富

D.矿产资源丰富

题型:填空题

做网织红细胞计数,下列哪项注意事项是错误的

A.网织红细胞体积较大,常在血膜尾部和两侧较多
B.复染对网织红细胞计数影响不大,因此可用瑞氏染液进行复染
C.油镜下计数1000个红细胞中见到网织红细胞数用百分数报告
D.可用绝对值来报告网织红细胞数即网织红细胞个/L
E.染色后应尽快计数,因网织红细胞在体外继续成熟

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患者女性31岁,滞留,不松动。X线片示横向埋伏阻生牙根之间,圆牙根无吸收。该患者的最佳处理方案为()

A.拔除,缺牙区义齿择期修复

B.保留,观察

C.拔除,缺牙区择期活动义齿修复

D.拔除,用正畸方法将开窗牵引于牙区

E.拔除,择期种植义齿修复

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