热门试题:
[判断题]正弦波脉宽调制(SPWM)是指参考信号为正弦波的脉冲宽度调制方式。
A.正确
B.错误
[简答题]请指出‘看着这种饲养小姑娘谋利的制度，我不禁想起孩子时候看过的船户养墨鸭捕鱼的事了。’运用了什么修辞格？
[判断题]2.72.第72题
阻抗R、X的基准值不是RB、XB而是ZB,在求得R*、X*后,R、X值为R=R*ZB,X=X*ZB。
A.正确
B.错误
[判断题]大量禽类活体动物运输时，应尽量将活体动物安排在烟雾探测器的下方。
A.正确
B.错误
[单选题]日常维护是由驾驶员每日出车前、行车中和收车后负责执行的车辆维护作业，其作
业的中心内容是清洁、补给和 ( )。
A. 紧固
B. 安全检视
C. 调整
[多选题]吹扫清洗的方向一般应为( )。
A.由高处向低处
B.由低处向高处
C.顺着物料的方向
D.逆着物料的方向
[单项选择]
Text 3
The full influence of mechanization began shortly after 1850, when a variety of machines came rapidly into use. The introduction of these machines frequently created rebellions by workers who were fearful that the machines would rob them of their work. Patrick Bell, in Scotland, and Cyrus McCormick, in United States, produced threshing machines. Improve- meats were made in plows to compensate for different soil types. Stream power came into use in 1860s on large farms. Hay rakes, hay-loaders, and various special harvesting machines were produced, Milking machines appeared. The internal-combustion engine run by gasoline became the chief power source for the farm.
In time, the number of certain farm machines that came into use skyrocketed and changed the nature of fanning. Be-tween 1940 and 1960, for example, 12 million horses and mules gave way to 5 million tractors. Tractors offer many. features that are attractive to farmers. There are, for example,
A. mechanization is not yet introduced in some areas for economic reasons
B. human and animal labour in some areas are less expensive
C. culture is not a factor in obstacling the introduction of mechanization
D. different kinds of mechanized fanning tools are used in different cultures
[多选题]游乐设施的乘坐说明应包括该设施的( )等。
A.运动特点
B.适应对象
C.注意事项
D.禁止事宜
[单选题]每个防烟分区的建筑面积不宜超过( )，且防烟分区不应跨越防火分区。
A.300㎡
B.500㎡
C.800㎡
D.1000㎡
[单选题]在管理的各项职能中,最具有规范性、技术性的职能是( )。
A.计划
B.组织
C.领导
D.控制
[判断题]烟、雾、粉尘等物质是气体，易进入呼吸系统，危害人体健康。 ( )
A.正确
B.错误
[判断题]CIR与FAS调度台/车站台通话质量的3级：杂音对通话稍有影响。
A.正确
B.错误
[判断题]银行业金融机构清分中心发现的假币需填写《假币代保管登记簿》的仅限于100元面额。
A.正确
B.错误
[单选题]车辆偏移量与转向架轴距的关系是（ ）。
A.总偏移量随轴距增大而增大
B.总偏移量随轴距增大而减小
C.外偏移量随轴距增大而增大
D.外偏移量随轴距增大而减小
[单选题]37、微机联锁系统的人机会话程序设计中，定义了（）信号机模块。
A.A、5种
B.B、7种
C.C、11种
D.D、15种
[单项选择]某单色光垂直入射到一个每一毫米有800条刻痕线的光栅上，如果第一级谱线的衍射角为30°，则入射光的长应为（）。
A. 0.625μm
B. 1.25μm
C. 2.5μm
D. 5μm
[单选题]张某投保车损险保额 10 万元，保险期限为 2021 年 2 月 5 日－2022. 年 2 月 4 日，2021 年 5 月 5 日发生碰撞使车辆全部损毁。保险人按实
际价值赔偿后，该保单终止。终止的原因是( )。
A. 协议终止
B. 义务已履行而终止
C. 自然终止
D. 解除终止
[多选题]保密设备。完善____的安全防护措施,配备必要的安全防护软、硬件。( )
A.政务信息网络
B.涉密计算机
C.涉密载体
[单项选择]定活通业务的转存金额必须以（）为单位的倍数转存。
A. 1万
B. 10万
C. 50万
D. 100万
[单选题]需要（）操作设备的配电带电作业工作票和需要办理工作许可手续的配电第二种工作票，应在工作前一天送达设备运维管理单位。
A.带电作业人员
B.运维人员
C.监控人员
D.值班调控人员
E.略
F.略
[单选题]在带电线路、设备附近立、撤杆塔，杆塔、拉线、临时拉线、起重设备、起重绳索应与带电线路、设备保持表6-1所规定的安全距离，且应有防止（）接近带电导线的措施。
A.立杆过程中拉线跳动和杆塔倾斜
B.立、撤杆过程中拉线跳动和杆塔倾斜
C.立、撤杆过程中拉线跳动
D.撤杆过程中拉线杆塔倾斜
[单项选择]下列的叙述中错误的是
A. 大多数计算机系统将CPU执行状态划分为管态和目态
B. 管态又称特权状态、系统态或核心态。通常操作系统在管态下运行
C. 系统在目态下也能够执行特权指令
D. 机器处于目态时，程序只能执行非特权指令
[单选题]对电力设备进行红外检测必须严格执行()。
A.《电业安全工作规程》
B.《电力电缆检修规程》
C.《电力电缆运行规程》
D.线路巡视要求
[填空题]Before Jack became a teacher, he told me what he wanted 76. ______
to be a lawyer when he was at school. 77. ______
Jack had worked very hard and tried enter 78. ______
into a well-known university, But some unpleased thing 79. ______
happened in his family, that made him have to 80. ______
work for living. Though he was very young, he had worked 81. ______
as a bus-driver, a dustman and a salesman. However, he spends 82. ______
his free time in studying and final became a college 83. ______
teacher. He often said that, "young people full of 84. ______
hopes after they step into the society. " 85. ______
[单选题]飞车安装完毕，检查飞车保险已扣好后，方可从挂点处转移至飞车上，转移时，安全带应挂在(____)。
A.受损导线
B.滑车上牢固构件
C.挂车导线
D.整相导线
[单选题]( )是指继电器不动作时处于断开状态的接点。
A.动断接点
B.动合接点
C.延时动断接点
[判断题]国家实行生产安全事故责任追究制度。
A.正确
B.错误
[单选题]DS6-K5B系统每块FSIO板只有（）条与电子终端连接的回线。
A.1
B.2
C.3
D.4
[单选题]驾驶出租汽车行驶在积雪路面，不安装防滑链容易导致____.
A.车速过快
B.车胎爆裂
C.车辆侧滑
D.制动失效
[判断题]跨立的动作要领其中规定右脚向右跨出约一脚之长。( )
A.正确
B.错误
[单选题]关于肾的额状切面正确的描述是:
A. 可见锥形的肾锥体,尖向皮质
B. 肾锥体与肾柱构成肾髓质
C. 皮质位居肾实质的表层,无血管故色淡(新鲜标本上)
D. 肾窦向外缩细,延伸为肾盂
E. 每个肾小盏可包绕 1-3 个肾乳头
[多项选择]一女性患者，年龄39岁，因反复发作性腹痛、上腹部扪及肿块、皮肤轻度黄染来做超声检查，于右上腹部可见一9cm×6cm囊性肿块，边界清晰，其内透声良好。依发生部位不同，本病的分型包括（）。
A. Caroli病
B. 肝内外胆管囊状扩张症
C. 胆囊管囊状扩张
D. 壶腹部囊肿
E. 先天性胆总管囊状扩张症
F. 胰头囊肿
[填空题]关于印发《普速旅客列车车门管理规定》的通知（铁总运2015-191号），结合部管理，列车上编挂的邮政车车门由（） 人员负责管理，发电车车门由发电车乘务员负责管理；编挂的试验、检测、回送车等不办理旅客乘降业务的车辆，由申请挂运单位负责该车辆的车门管理和安全检查、巡视。
[单项选择]对于无水峰光纤，ZXMPM600设备可提供最大（）通道。
A. 4
B. 8
C. 12
D. 16
[判断题]311121.3×1.5---A、3×100V三相三线有功电能表，经200/5电流互感器和10000/100电压互感器计量，倍率为4000。( )
A.正确
B.错误
[多项选择]SF6断路器的种类按构造分，有（）。
A. 半敞开式
B. 敞开式
C. 封闭式
D. 半封闭式
[单项选择]Decide which of the choices given below would best complete the passage if inserted in the corresponding blanks. Mark the best choice for each blank on your answer sheet.
More than 40 thousand readers told us what they looked for in close relationships, what they expected (31) friends, what they were willing to give in (32) , and how satisfied they were (33) the quality of their friendships. The (34) give little comfort to social critics. Friendship (35) to be a unique form of (36) bonding. Unlike marriage or the ties that (37) parents and children, it is not defined or regulated by (38) Unlike other social roles that we are expected to (39) as citizens, employees, members of professional societies and (40) organizations—it has its own principle, which is to promote (41) of warmth, trust, love, and affection (42) two people.
The survey
A. civil
B. human
C. mankind
D. individual
[填空题]（）和布朗根据教师的需要和不同时期所关注的焦点问题，把教师的成长划分为（）（）和（）三个阶段。（新教师更多地关注生存阶段；老教师比新教师更关注情境阶段；能否自觉关注学生是衡量一个教师是否成熟的重要标志之一。）
