热门试题:
[单选题] 站内和行人较多的地段,牵引供电设备支柱在距轨面2.5m高处均要设白底黑字“( )”并有红色闪电符号的警示标志。
A.电化区段
B.请勿靠近
C.高压危险
D.严禁攀登
[单选题]小剂量口服固体制剂、胶囊剂、膜剂或注射用无菌粉末中的每片（个）含量偏离标示量的程度为
A.重量差异检查
B.崩解时限
C.溶出度
D.含量均匀度
E.融变时限
[单选题]《普修规》信号标志，设在列车运行方向（ ）侧（警冲标除外）。
A.左
B.右
C.内
D.外
[不定项选择题]共用题干
第二篇
Attitudes to AIDS Now
Most people say that the USA is making progress in fighting AIDS,but they don't know there's no cure
and strongly disagree that" the AIDS epidemic（流行）is over,"a new survey finds.
The findings,released Thursday by the Kaiser Family Foundation,reassure activists who have worried
that public concern about AIDS might disappear in light of recent news about advances in treatment and
declines in deaths.
"While people are very optimistic about the advances,they're still realistic about the fact that there is no
cure",says Sophia Chang,director of HIV programs at the foundation.
The Kaiser survey, like a recent USA TODAY Gallup Poll（民意测验）,does find that the number of
people ranking AIDS as the country's top health problem has fallen.In the Kaiser poll,38%say it's the top
concern,down from 44% in a 1996 poll;in the Gallup Poll,29% say AIDS is No.1,down from 41% in 1992
and 67% in 1987.
Other findings from Kaiser,which polled more than 1,200 adults in September and October and asked
additional questions of another 1,000 adults in November:
52% say the country is making progress against AIDS,up from 32%in 1995.
51% say the government spends too little on AIDS.
86% correctly say AIDS drugs can now lengthen lives;an equal number correctly say that the drugs are
not cures.
67% incorrectly say that AIDS deaths increased or stayed the same in the past year;24% know deaths
fell.
Daniel Zingale,director of AIDS Action Council,says,"I'm encouraged that the American people are
getting the message that the AIDS epidemic isn't over. I hope the decision-makers in Washington are getting
the same message... We have seen signs of complacency（得意）."
Most people in the USA believe that________.
A.advances have been made in treating AIDS
B.AIDS is no longer an epidemic
C.AIDS is killing more people than before
D.there is still no cure for AIDS
[判断题]铁路通信设备技术状态大数据平台技术架构主要是由数据层、存储层、分析层和应用层等组成。
A.正确
B.错误
[单项选择]皮肤厚度约为（）。
A. 0.5～2.5mm
B. 0.5～3.5mm
C. 0.5～4.0mm
D. 1.0～3.5mm
E. 1.0～4.0mm
[多项选择]下列哪些行为海关予以警告，可以处3万元以下罚款：
A. 擅自开启或者损毁海关封志的
B. 遗失海关制发的监管单证、手册等凭证，妨碍海关监管的
C. 有违反海关监管规定的其他行为，致使海关不能或者中断对进出境运输工具、物品实施监管的
D. 不按照规定接受海关对进出境运输工具、货物、物品进行检查、查验的
[单项选择]男性，35岁，洗澡时发现右侧胸壁直径3．0cm的肿物来就诊。体检：右胸壁可及一波动性包块，表面无红肿，无压痛，边界较清楚还应做其他的检查是（）
A. 肺灌注显像检查
B. 纤维支气管镜检查
C. 胸穿肺活检
D. 正侧位胸片
E. 以上都不对
[单选题]新增负载前，应核查电源负载能力，并确保（）开关容量匹配。
A.上下级
B.负载接入
C.各级
D.整流模块
[填空题]电动势的方向规定，在电源( )，由( )指向( )。
[判断题]2.246.
CAD中，多线段的每一段的宽度可以单独指定。
A.正确
B.错误
[单选题]（ ）是指动静触头的相对运动方向基本上与接触表面垂直的一种触头。
A.滑动触头
B.动断触头
C.滚动触头
D.对接触头
[单选题]动车组重联与摘解作业由( )完成。
A.司机与随车机械师共同
B.随车机械师和驻站列检人员共同
C.驻站列检人员
D.司机
[单选题]单选题:()主要检查对过去提出的安全问题和发生的生产事故及安全隐患是否采取了安全技术措施和安全管理措施,进行整改的效果如何。
A.查思想
B.查管理
C.查隐患
D.查整改
[单项选择]
With only about 1,000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species. That’s a move similar to what a Texas A＆M University researcher has been undertaking for the past five years in a project called "Noah’s Ark".
Dr. Duane Kraemer, a professor in Texas A＆M’s College of Veterinary Medicine and a pioneer in embryo transfer work and related procedures, says he salutes the Chinese effort and "I wish them all the best success possible. It’s a worthwhile project, certainly not an easy one, and it’s very much like what we’re attempting here at Texas A＆M—to save animals from extinction. "
Noah’s Ark is aimed at collecting eggs, embryos, semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Kraemer says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2,000 species of mammals, birds and reptiles will become extinct over the next 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
"The nuclear transfer of one species to another is not easy, and the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy. It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort , "adds Kraemer, who is one of the leaders of the Missyplicity Project at Texas A＆M, the first-ever attempt at cloning a dog.
"They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly applaud their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.
What could be the major problem in cloning pandas according to Professor Kraemer（）
A. Lack of available panda eggs
B. Lack of host animals
C. Lack of qualified researchers
D. Lack of funds
[判断题]东风8B型内燃机车：机车车体是机车上部动力装置的安装基础和司乘人员的工作场所。
A.正确
B.错误
[单项选择]35#根管锉（）
A. 白
B. 黄
C. 红
D. 蓝
E. 绿
[单选题]对于或门来讲，其输入、输出关系为( )。
A.有1出1
B.有0出0
C.全1出1
D.全1出0
[单选题] 单选题 微机上操作系统的作用是( )。
A. 解释执行源程序
B. 编译源程序
C. 进行编码转换
D. 控制和管理系统资源
[单项选择]左心衰竭发生呼吸困难的机制不包括
A. 肺淤血
B. 肺泡张力增高
C. 肺泡弹性减退
D. 右心房与上腔静脉压升高
E. 肺循环压力升高
[判断题]Ⅱ级施工由施工办主任（副主任）、项目主体业务部门主任（副主任）担任施工协调小组组长、副组长，成员由行车组织、设备管理、建设、设计、施工、监理、安监、项目管理机构等有关部门主管人员和单位主管领导组成
A.正确
B.错误
[单选题]下列各项中，不属于存货储存变动成本的有（ ）。
A.差旅费
B.存货的变质损失
C.存货的保险费用
D.存货占用资金的应计利息
[判断题]十字星的出现表明多空双方力量暂时平衡，使市势暂时失去方向，无需多加注意。( )
[多项选择]机动车维修质量检验人员存在下列（）情况，发证机关注销其从业资格证件。
A. 年龄超过60周岁的
B. 机动车驾驶证被注销或者吊销的
C. 超过从业资格证件有效期180日未申请换证的
D. 自己申请注销的
[判断题]拆除⼯程施⼯时,应有防⽌扬尘和降低噪声的措施。
A.正确
B.错误
[单项选择]设x=4，y=6，则以下不能在窗体上显示出“A=10”的语句是
A. Print A=x+y
B. Print "A="; x+y
C. Print "A="+Str(x+y)
D. Print "A=" & x+y
[判断题]由于带入旋风分离器的催化剂量很大，对旋风分离器分离效率的要求很高，一般要求在99.99%以上。
[多选题]塔机安装方案应包括的内容有( )。
A.安装位置平面和立面图
B.所选用塔机型号及性能技术参数
C.安装顺序和安全质量要求
D.施工人员配置
E.安全装置的调试
[单选题][18]数据恢复时,我们应该选择什么样的备份方式( )。
A. 磁盘到磁盘的备份
B. 文件到文件的备份
C. 扇区到扇区的备份
D. 磁盘到文件
[判断题]压力等级105MPa时，采取以下组合形式：环形防喷器＋单闸板防喷器＋双闸板防喷器＋钻井四通。组合见图三或图四。
A.正确
B.错误
[判断题]安全事故报告应及时、准确、完整，任何单位和个人对事故不得迟报、漏报、谎报或者瞒报。
A.正确
B.错误
[判断题]运动参照系相对于静止参照系的速度。
A.正确
B.错误
[判断题]()调车人员上车前应注意脚蹬、车梯、扶手，平车、砂石车的侧板和机车脚踏板的牢固状态。
A.正确
B.错误
[单选题]1.170. 第170题
胸外按压与口对口（鼻）呼吸同时进行，节奏为：单人抢救时，每按压（ ）次后吹气两次，反复进行.
A.10
B.15
C.20
D.30
[单选题]（ ）是企业流动性最强的资产，反映企业即期的偿债能力。
A.应收账款
B.货币资金
C.存货
D.待摊费用
[单选题]构建中国特色现代军事力量体系,重点是( )。
A.优化作战力量结构
B.提高战略预警
C.推进练兵备战
D.推进富国强军统一
