| One of the most important
technological developments during the 1980s has been the emergence of optical
fiber communication as a major international industry. One indication of the{{U}}
(51) {{/U}}of this development is the total{{U}} (52) {{/U}}of
installed fiber, which was estimated to be 3.2 million kilometers in the U.S.
alone by the end of 1987. Over 90% of this fiber was placed.{{U}} (53)
{{/U}}during the time period of 1982—1987. Long-haul trunk
installations(长途干线设施) have dominated,{{U}} (54) {{/U}}for about 95% of
the fiber in the U.S. In the early 1950s the researchers who produced the first clad glass optical fibers were not{{U}} (55) {{/U}}of using them. for communications.{{U}} (56) {{/U}} , fiber optics was already a well-established commercial technology whe A. what B. which C. where D. whether [单项选择]下列财产中，不能作为抵押财产的是( )。
A. 正在建造的船舶 B. 在建工程项目 C. 城市土地使用权 D. 被法院扣押的车辆 [单项选择]I shall be busy next Monday. I ______ classes the whole morning and a lecture in the afternoon.
A. have, attend B. am having, would attend C. would have, would attend D. shall be having, shall be attending [单选题]配砟车用旁路制动开关施行制动,制动缸压力由零升至340kPa的时间不大于( ) s。
A.3 B.4 C.5 D.7 [单选题]每节车厢中的( ）号门和( ）号门带门外紧急解锁装置。
A.2、3 B.3、4 C.4、5 D.3、6 [单项选择]可以缩短工程从规划、设计到竣工的周期，整个工程可以提前投产，节约投资，减少投资风险，较早地取得收益的管理模式是( )模式。
A. EPC B. PMC C. CM D. “代建制” [单选题]采用密接式车钩的旅客列车，在运行途中因故障更换15号过渡车钩后限速（ ）km/h。
A.100 B.120 C.140 D.80 [多选题]信号安全工作应防止“两失一违”即：（）、违章作业。
A.电路失效 B.信号设备失修 C.轨道电路失修 D.信号设备联锁失效 [单项选择]热凝塑料的微波聚合法中电子微波炉的功率为
A. 500W B. 110W C. 380W D. 220W E. 250W [填空题]About Wetlands in the U.S.A.
People enjoy a famous soup (SHE-CRAB SOUP) in North Carolina because the days of the regional soup may be getting fewer and fewer: "no wetlands, no seafood". Ⅰ. The current situation of wetlands: 1) California has lost (1)______of wetlands —91 percent, (1) ______ and the rate of loss of wetlands is an acre per minute. 2) 21 other states have losted at least halfof their (2)______ (2) ______ Ⅱ. The key value of wetlands: 1) Each acre of wetland is worth (3)______more money than (3) ______ an acre of ocean in the benefits; 2) Wetlands act like sponges and (4)______like our kidney: (4) ______ A. filtering out hazardous materials like dirt, chemicals, pesticides and fertilizers; B. serving as large [判断题]依据《评标委员会和评标方法暂行规定》(七部委12号令），采用经评审的最低投标价法的，中标人的投标应当符合招标文件规定的技术要求和标准，但评标委员会无需对投标文件的技术部分进行价格折算。
A.正确 B.错误 [多项选择]估价所需的资料包括下列几个方面？（）
A. 对房地产价格有普遍影响的资料 B. 对估价对象所在地区的房地产价格有影响的资料 C. 类似房地产的交易、成本、收益实例资料 D. 反映估价对象状况的资料 E. 反映估价对象权益和区位状况的资料 [单选题]人员密集的公共场所的室外疏散通道的净宽度不应小于（）m。
A.2 B.2.5 C.3 D.4 [判断题]危险化学品是指具有易燃、易爆、有毒、有害等特性，会对人员、设施、环境造成伤害或损害的化学品。
A.正确 B.错误 [单选题]《行规》第59条：特殊情况机车车辆不能出清调车信号机防护的轨道电路区段，须（ ）越过关闭的调车信号机或无调车信号防护的道岔时，调车指挥人必须取得车站值班员（信号长）的允许。
A.中途返回 B.原路返回 C.机车牵引运行 D.机车车列 [单项选择]当前应用最广泛的数据结构模型是______。
A. E-R模型 B. 关系模型 C. 网状模型 D. 层次模型 [简答题]某正线线路年通过总质量为45Mt，其适用轨道类型为( )。
[简答题][文字开始]
数据可视化能使人们用视觉器官直接感受到数据的许多内在本质。因此，数据可视化是人们研究科学、认识世界所不可缺少的手段。MATLAB不仅在数值计算方面是一个优秀的科技应用软件，在数据可视化方面也具有上佳表现。 MATLAB具有二维、三维乃至四维的图形表现能力。可以从线型、边界面、色彩、渲染、光线、视角等方面把数据的特征表现出来。 [文字结束] [单项选择]
经济全球化是一把“双刃剑”。一方面它依靠科技加速了世界经济的发展和繁荣；另一方面，它给发达国家和发展中国家带来不均等、不公平的竞争机会，扩大了贫富差距。面对经济全球化的趋势，我国应当（） A. ①② B. ②③ C. ①③ D. ②④ [多项选择]Throughout our country, more and more private schools are set up. Some people doubt about the effectiveness of these private schools. They say adequate money doesn’t necessarily guarantee better education.
Write an article to clarify your own points of view towards this issue. You should use your own ideas, knowledge or experience to support your argument. You should write no less than 250 words. Write your article on ANSWER SHEET 2. [判断题]阴燃起火能形成明显烟熏痕迹。
A.正确 B.错误 [填空题] 扳道、信号人员在扳动道岔、操纵信号时，认真执行（ ）制度；对进路上不该扳动的道岔，也应认真进行确认。
[填空题]
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