ATM网络采用 (1) 多路技术传送信元，典型的数据速率为155.5Mbit/s，这样每秒大约可以传送 (2) 万个信元。采用短的、固定长度的信元，为使用硬件进行高速数据交换创造了条件。ATM是为B-ISDN定义的传输和交换方式，可以适应各种不同特性的电信业务，CBR(Constant Bit Rate)模拟 (3) 业务，适用这种业务的ATM适配层是 (4) ，用于ATM局域网仿真的ATM适配层是 (5) 。
5（）
In the two decades between 1910 and 1930, over ten percent of the Black population of the United States left the South, where the majority of the Black population had been located, and migrated to northern states, with the largest number moving, it is claimed, between 1016 and 1918. It has been frequently assumed, but not proved, that most of the migrants in what has come to be called the Great Migration came from rural areas and were motivated by two concurrent factors: the collapse of cotton industry following boll weevil infestation, which began in 1898, and increased demand in the North for labor following the cessation of European immigration caused by the outbreak of the First World War in 1914. This assumption has led to the conclusion that the migrants’ subsequent lack of economic mobility in the North is tied to rural background, a background that implies unfamiliarity with urban living and a lack of industrial skills.
But the question of who actually left
A. The effect of migration on the regional economies of the United States following the First World War.
B. The reasons for the subsequent economic difficulties of those who participated in the Great Migration.
C. The transition from an urban existence for those who migrated in the Great Migration.
D. The transformation of the agricultural South following the boll weevil infestation.
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A.最大转弯半径和最小俯仰角 B.最小转弯半径和最大俯仰角 C.最大转弯半径和最大俯仰角 [单项选择]_________ is often the case with a new idea, much preliminary activity and optimistic discussion produced no concrete proposals.
A. That B. It C. this D. As [单项选择]具有抗阿米巴原虫和抗滴虫作用的药物是（）
A. 阿苯达唑 B. 氯喹 C. 吡喹酮 D. 甲硝唑 E. 乙胺嗪 [多选题]太平天国运动的反封建意义表现在 ( )
A.没收官僚地主的土地,削弱了封建的经济基础 B.完全摧毁了封建土地所有制 C.儒家文化被否定,批判了封建主义的精神支柱 D.猛烈冲击了封建统治秩序 [单选题]因条件限制，车站存在固定旅客列车接入不靠近站台的股道办理旅客（含通勤人员）乘降时，车站须制定具体的()措施。
A.安全 B.卡控 C.防护 D.安全卡控 [单选题]进行绝缘绳索绝缘试验时，被试品温度应不低于+5 ℃。户外试验应在良好的天气进行，且空气相对湿度一般不高于（ ）%。
A.85 B.80 C.75 D.70 [单选题]焊接时的噪声有时可高达_____dB,对人体产生影响。
A.150 B.120 C.100 [判断题]隔离开关左接线端子应能在逆时针92度范围内转动灵活。
A.正确 B.错误 [单项选择]天然气的主要输送方式错误的是（）
A. 管道输送 B. 液化运输 C. 皮带输送 D. 压缩输送 [填空题]施工企业应采用信息管理技术，通过（）的开发和利用，提高质量管理水平。
[单项选择]An analyst does research about methods of distributing new government securities. Which of the following is the regular way for U. S. government to issue U. S. Treasury securities（）
A. Tap method. B. Regular auction cycle/single price method. C. Regular auction cycle/multiple price method. [单项选择]提高压缩机油冷却系统循环冷却水压力的操作正确的是（）
A. 关小循环水进口阀门 B. 开大循环水出口阀门 C. 开大循环水进出口阀门 D. 开大循环水进口阀门，适当关小循环水出口阀门 [判断题]各级部门、车间、班组、项目团队的绩效考核结果与其负责人绩效工资、所属员工的绩效工资总额挂钩。（ ）
A.正确 B.错误 [单项选择]この競技場は5万人（）の実を収容できる？
A. なり B. から C. だけに D. さえ [单选题]试验装置的金属外壳应可靠接地；高压引线应尽量缩短，并采用（）高压试验线，必要时用绝缘物支持牢固。
A.常见的 B.普通的 C.便携式 D.专用的 [判断题]铁跨公立交桥钢管限高架维修长度每米折合0.5桥隧换算米。
A.正确 B.错误 [单选题]下面行为属于行为规范基本行为准则中工作作风的是
A.：与客户有不同意见时，应保持头脑冷静，必要时要请示上级主管领导，切忌与客户争执。 B.：进入客户的办公场所，一定要敲门，即使门未关也要敲门。 C.：对客户提出的问题、要求、意见和建议要做好详实记录，《首答负责制》认真落实。 D.：给客户打电话时，打电话前要做好准备，想好话题打好腹稿。 E./ F./ [多项选择]“四有公民”的“四有”指（）。
A. 有理想 B. 有文化 C. 有知识 D. 有道德 E. 有纪律 [判断题]化学救援消防车指主要装备化学事故处置器材和装备,用于处置化学灾害事故的专勤消防车。(易)( )
A.正确 B.错误 [单项选择]Why does cream go bad faster than butter Some researchers think they find the answer, and it comes down to the structure of the food, not its chemical composition—a finding that could help rid some processed foods of chemical preservatives.
Cream and butter contain pretty much the same substances, so why cream should sour much faster has been a mystery. Both are emulsions—tiny globules (小球) of one liquid evenly distributed throughout another. "The difference lies in what’’s in the globules and what’’s in the surrounding liquid", says Brocklehurst, who led the investigation. In cream, fatty globules drift about in a sea of water. In butter, globules of a watery solution are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the mixture. "This means that in cream, the bacteria are free to grow throughout the mixture", he says.
When the situation is reversed, the bacteria are locked away in compartments (密封舱) buried deep
A. are more evenly distributed in cream B. multiply more easily in cream than in butter C. live on less fat in cream than in butter D. produce less waste in cream than in butter [单项选择]国家对从事物业管理活动的企业实行( )制度。
A. 自治管理 B. 资质管理 C. 合格证书 D. 职业资格证 [单项选择]After a lot of difficulties, Geoffrey ______ to open the door.
A. succeeded B. gained C. obtained D. managed [填空题]电子图板V2菜单系包括（）、常驻菜单、立即菜单、下拉菜单、工具菜单及工具条和属性条七部分。
[判断题]道岔、调节器、大跨桥梁、过渡段和沉降等重点地段的线路设备，应在昼间进行巡视，每年应不少于一遍
A.正确 B.错误 [多选题]下列属于防火监督处战备职责的是?
A.及时向灭火救援指挥部和消防大队、中队通报辖区消防安全重点单位存在的影响灭火救援工作的问题、火灾隐患及变化情况 B.指导推动微型消防站建设,及时向灭火救援指挥部通报情况 C.做好执勤力量对辖区消防安全重点单位熟悉和演练的协调工作,参与制定本级执勤战斗预案,提供相关信息资料 D.在发生火灾事故时,立即派员赶赴现场,提供灭火救援相关信息,协同开展灭火救援行动 [单选题]下列不属于房地产经纪人员心理素质要求的是（ ）。(2008年真题)
A.自知、自信 B.乐观、开朗 C.敢想、敢干 D.坚韧、奋进 我来回答: 提交
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