热门试题:
[单项选择]下列物质属于生长因子的是（）
A. 葡萄糖
B. 蛋白胨
C. NaCl
D. 维生素
[多选题]（多选）毛某在登杆过程中未戴安全帽，则《安规》中关于安全帽的规定，以下说法正确的是（）
A.任何人进入生产场所，应正确佩戴安全帽
B.在办公室、值班室等场所，确无磕碰、高处坠落或落物等危险的情况下，可不戴安全帽
C.从制造之日起，在使用塑料安全帽时应经常检查安全帽是否有破损、松脱等，若无缺陷，则可一直使用。
D.在天气高温时，为防止中暑，作业人员工作时可不佩戴安全帽。
[多项选择]一般情况下前牙3／4冠可覆盖的部位是（）。
A. 切端
B. 近中邻面
C. 远中邻面
D. 唇面
E. 舌面
[单选题]储油罐区内禁止装设（ ）电气设备。( )
A.防爆型
B.监控型
C.非防爆型
D.探测型
[单项选择] Millions of U. S. college students will have to shoulder more of the cost of their education under federal rules imposed late last month through a bureaucratic adjustment requiring neither congressional approval nor public comment of any kind. The changes, only a slight alteration in the formula governing financial aid, are expected to diminish the government’’s contribution to higher education by hundreds of millions of dollars, starting in the autumn of 2004. But they will also have a ripple effect across almost every level of financial aid, shrinking the pool of students who qualify for federal awards, tightening access to billions of dollars in state and institutional grants, and heightening the reliance on loans to pay for college.
How much more money this may require of students and their parents will vary widely, changing with each family’’s set of circumstances. Some families may be expected to pay an extra $100 or less each year, while others may owe well over $ 1,000 m
A. whether or not a family is below the poverty line
B. the proportion of not-necessary-expenses in a family’’s income
C. whether a family is on financial aid
D. how much family’’s should pay in state and local taxes
[填空题] You will hear five people talking about e-business in different areas.
For each extract there are two tasks. For Task One. choose the areas from the list A—H. For Task Two, choose the benefits from the list A-H.
You will hear the recording twice.
[单项选择]陕西省2017年新一轮退耕还林政策第一年每亩补助种苗费（）元。
A. 300
B. 350
C. 400
D. 500
[单项选择]类癌最重要的病理组织学特点是（）
A. 瘤细胞呈巢状条索、腺泡状或片块状生长
B. 瘤细胞异型明显
C. 瘤细胞核分裂象多
D. 呈浸润性生长
E. 瘤细胞具有嗜酸性大核仁
[单选题]下列食谱符合饮食健康的是()，
A.菠菜豆腐汤
B.番茄炒椰菜
C.黄瓜拌花生
D.菠菜炒虾皮
[判断题]安全工器具的电气试验和机械试验可由各使用单位根据试验标准和周期进行, 也可委托试验。
A.正确
B.错误
[单选题]一束（ ）通过有色溶液时，溶液的吸光度与溶液浓度和液层厚度的乘积成正比。
A.平行可见光
B.平行单色光
C.白光
D.紫外光
[填空题] 当相邻两个配电所的同一侧（ ）电源同时停电,而另一侧（ ）电源全部正常时,两所停电电源主供的贯通线路低电压跳闸,远动（ ）操作立即将两配电所（ ）合闸,分别按原供电方式向停电线路（ ）供电。反之亦然。
[单选题]选用电刷时,不用考虑( )性能指标。
A.接触电压降
B.摩擦系数
C.电流方向
D.圆周速度
[单项选择]杨子今年19岁，因为觉得自己已经长大，不能过度依赖父母，于是上大学后就开始利用课余时间从事兼职工作。杨子的举动体现了青少年具有( )的需要。
A. 为未来的生涯做准备
B. 建立个体的价值体系
C. 发展符合社会期望的认知技能和概念
D. 追求独立自主，少依附父母及他人
[填空题]（）是信托行为成立的前提，（）是信托的目的。
[单选题]南钢安全生产“十大禁令”中第六条,严禁未办理( )、未采取防护措施在易燃易爆设施上和区域内进行明火作业。
A.危险作业申请表
B.动火证
C.安全交底书
[单选题]䙲8
劳动者可以随时解除劳动合同的法定情形是，用人单位（ ）。
A.发生合并或者分立
B.变更名称、法定代表人、主要负责人
C.变更投资人
D.未依法为劳动者缴纳社会保险费
[单项选择]Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human (人的，通人情的) body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die.
Many people don’t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather.
Our body is (49) water, about 65% to 75%. If we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.
A. in
B. and
C. or
[单选题]门静脉高压症的主要原因是
A.门静脉主干先天性畸形
B.肝静脉血栓形成、狭窄
C.肝段下腔静脉阻塞
D.肝硬化
E.各种原因致脾静脉血流量过大
[单选题]上行数据分流的控制点在( ),MeNB在RRC_Reconfig消息中给UE配置上行分流门限和主路径，支持基于NR侧信号质量动态调整UL PrimaryPath，默认配置为NR,当NR的上行信号质量变差时切换到LTE,恢复时再切回到NR。
A. UDM
B.UE
C.基站
D. UPF
[判断题]( )开关元件反映的信息必须经过模数变换成数字信息后送入微机系统。
A.正确
B.错误
[判断题]( )免税烟草制品购销业务只能由取得特种烟草专卖经营企业许可证的企业经营。
[单项选择]逆转录病毒的核酸类型为（）
A. 单股负链RNA
B. 单股正链RNA
C. 单股正链DNA
D. 单股负链DNA
E. 单股正链RNA，二聚体
[单项选择] Green Wave Washed Over Mainstream Shopping
Research in Britain has shown that "green consumers" continue to flourish as a significant group amongst shoppers. This suggests that politicians who claim environ mentalism is yesterday’’s issue may be seriously misjudging the public mood.
A report from Mintel, the market research organization, says that despite recession and financial pressures, more people than ever want to buy environmentally friendly products and a "green wave" has swept through consumerism, taking in people previously untouched by environmental concerns. The recently published report also predicts that the process will repeat itself with "ethical" concerns, involving issues such as fair trade with the Third World and the social record of businesses. Companies will have to be more honest and open in response to this mood.
Mintel’’s survey, based on nearly 1,000 consumers, found that the proportion who look for green products and are prepar
A. Y
B. N
C. NG
[单项选择]某牧区已进行网络直报的县医院发现一例肺炭疽病例，医院应该在多长时间内将传染病报告卡进行网络直报（）
A. 24小时
B. 12小时
C. 6小时
D. 2小时
[多项选择]企业持有现金的动机有( )。
A. 交易性动机
B. 预防性动机
C. 储存性动机
D. 投机性动机
[多选题]对焊机作业要求描述正确的是（ ）。
A.多台对焊机并列安装时，间距不得少于2m
B.对焊机应安置于室内，并有可靠的接地（接零）
C.焊接操作时应戴防护眼镜及手套
D.作业前，检查对焊机的压力机构应灵活
[单选题]施工项目部除项目经理、（ ）外，其他管理人员可以在同一个项目部内兼任不超过两个岗位，但不得在另一个合同项目中兼职。
A.资料员
B.材料员
C.质量元
D.安全员
[简答题]机体从哪四个方面对酸碱平衡进行调节，各有何特点？
[单项选择]实事求是思想路线的前提和基础是（）
A. 一切从实际出发
B. 理论联系实际
C. 实事求是
D. 在实践中检验真理和发展真理
[判断题]电器设备、线路必须保持完好，禁止使用未安装触电保护器的各种有线手持式移动电动工具和移动设备。
A.正确
B.错误
[单选题]在带电作业过程中如设备突然停电，工作负责人应（）。
A.令工作人员停止作业
B.尽快与调度联系
C.立即向领导汇报
[单选题] 公安机关人民警察因侦查犯罪的需要,使用企事业组织或个人的交通工具,造成损失的,( )
A. 由该人民警察所属机关给予赔偿
B. 由该人民警察给予赔偿
C. 由该人民警察所属机关给予赔偿后,向该人民警察追偿
D. 由交通工具所有人承担
[单项选择]麦冬的功效是（）
A. 润肺益肾，养肝
B. 润肺益胃，养肝
C. 润肺益肾，清心
D. 养阴生津，润肺清心
E. 润肺益肾，益胃
[单项选择]
The most damning thing that can be said about the world’s best-endowed and richest country is that it is not only not the leader in health status, but that it is so low in the ranks of the nations. The United States ranks 18th among nations of the world in male life expectancy at birth, 9th in female life expectancy at birth, and 12th in infant mortality. More importantly, huge variations are evident in health status in the United States from one place to the next and from one group to the next.
The forces that affect health can be divided into four groupings that lend themselves to analysis of all health problems. Clearly the largest group of forces resides in the person’s environment. Behavior, in part derived from experiences with the environment, is the next greatest force affecting health. Medical care services, treated as separate from other environmental factors because of the special interest we have in them, make a modest contribution to health status
A. some health problems cannot be solved by better medical care
B. the use of alcohol and other substances is harmful to health
C. poor health results from lack of proper medical care
D. wealth may contribute to poor health status
