[多选题]前台版本升级涉及的操作包括（ ）
A.版本加载
B.版本激活
C.检查版本激活情况
D.存盘操作

[判断题] 并联电容器并联在系统的母线上,向系统提供容性无功功率,提高母线电压水平。
A.正确
B.错误

[判断题][T]A-A-J-010 3 1 1
降雾、暴风雨雪时，可以办理跟踪出站调车。
A.正确
B.错误

[单项选择]冷高分液位控制阀失灵时，以下处理正确的是（）。
A. 立即关闭液控阀前后阀门
B. 液控阀立即改手动控制，切换备用阀
C. 外操立即至现场手动打开控制阀
D. 立即关闭紧急切断阀

[单项选择]瑞氏染料的主要成分为（）
A. 丙酮、伊红、亚甲蓝
B. 无水乙醇、伊红、亚甲蓝
C. 甲醇、伊红、亚甲蓝
D. 二甲苯、伊红、亚甲蓝
E. 乙二醇、伊红、亚甲蓝

[填空题]莫泊桑一生共创作了6部长篇小说，分别是《漂亮朋友》、《一生》、《温泉》、（）、《像死一般强》和《我们的心》。

[单选题] 致命电流:引起心室颤动而危及生命的最小电流,成人一般为___mA。
A.0.5
B.1
C.10
D.50

[单项选择]下列物料筛分时筛分效率最低的组分为（）
A. 一半为阻碍粒一半为易筛粒
B. 一半为难筛粒一半为易筛粒
C. 阻碍粒、易筛料、难筛粒各占三分之一
D. 全部为易筛粒

[判断题]瞬时电流速断保护是主保护。( )
A.正确
B.错误

[简答题]ACD保存液有什么缺点？

[单选题]营销服务场所应保障疏散通道、安全出口畅通，并设置消防安全疏散指示标志和（ ）设施。
A.应急照明
B.应急逃生
C.应急躲避
D.畅通疏散

[填空题] For many women choosing whether to work or not to work outside their home is a luxury: They must work to survive. Others face a hard decision. Perhaps the easiest choice has to do with (36)__________. One husband said, "Marge and I decided after careful consideration that for her to go back to work at this moment was an (37)__________we couldn’’t afford." With two preschool children, it soon became clear in their figuring that with babysitters, (38)__________, and increased taxes, rather than having more money, they might (39)__________end up with less. Economic factors are usually the first to be (40)__________, but they are not the most important. The most important aspects of the decision have to do with the (41)__________needs of each member of the family. It is in this area that husbands and wives find themselves having to face many confusing and (42)__________feelings. There are many women who find that homemaking is boring or who feel (43)__________if they hav

[单选题]使用数字键盘可以触发应急进入驾驶舱的蜂鸣器鸣叫，方法是在键盘上输入（ ）位数的代码（由航空公司编写），再按“#”键
A.0-7
B. 2-7
C.任意

[单项选择]


A. following
B. among
C. succeeding
D. between

[多项选择]关于冷母液桶的说法正确的是（）。
A. 2#冷母液桶到一定的液位向1#冷母液桶溢流
B. 1#冷母液桶搅拌电流不宜控制过高
C. 2#冷母液桶搅拌电流需控制平稳
D. 1#冷母液桶尖底有碱液回收装置
E. 冷母液桶出液直接进蒸馏塔
F. 冷母液桶可不设搅拌装置

[单选题]甲醛的职业禁忌症有(　　)。
A.全身性皮肤病和慢性眼病
B.原发性高血压
C.风湿性关节炎

[单选题]使用电磁操动机构的断路器进行合闸操作时，应注意观察( )回路所接直流电流表的变化情况，合闸操作后直流电流表应返回。
A.保护电源
B.合闸电源
C.分闸电源
D.控制电源

[多选题]幼儿阶段是生长发育的重要阶段，饮食营养是影响生长发育的重要因素，为他们提供充足的营养物质不仅可以促进身体发育，对大脑发育和智力发展也非常重要。因此幼儿合理膳食的标准是( )。
A.多样性
B.充分性
C.平衡性
D.适度性

[多项选择]弛张热热型一般常见于下述哪些患者（）
A. 伤寒
B. 败血症
C. 疟疾
D. 风湿热
E. 肺炎链球菌性肺炎

[单选题]适合细菌生长的C/N比为（ ）。
A.5：1
B.25：1
C.40：1
D.80：1

[多选题]如何提升强攻、内攻能力?（）(　　)
A.高强度体能训练
B.装备应用训练、个人安全防护训练
C.攻坚组协同配合训练
D.模拟实战训练（烟热室、真火、高空等）、心理训练。

[单选题]686. 686.接头螺栓以抗拉强度划分为()两种高强度螺栓。
A.7.6级与8.8级
B.8.8级与9.9级
C.9.9级与10.8级
D.10.9级与8.8级

[判断题]目的性是实践能动性的主要表现。
A.正确
B.错误

[判断题]开启高压电缆分支箱（室）门应两人进行，接触电缆设备前应验明确无电压并接地。
A.正确
B.错误

[判断题]全自动车钩为后置式安装。
A.正确
B.错误

[多选题]
以下哪些是 AWS Global Accelerator 的好处? (选择两项。)
A. 降低在 AWS 上运行服务的成本
B. 提高了部署在 AWS 上的应用程序的可用性
C. 存储在 AWS 上的数据具有更高的持久性
D. 减少到达部署在 AWS 上的应用程序的延迟
E. 存储在 AWS 上的数据的安全性更高

[单选题] 一般千分尺的螺距为( )。
A.0.2 mm
B.0.4 mm
C.0.5 mm
D.1 mm

[单选题]采用焊接工艺制造的铜铝过渡的电连接零件，在铜铝焊接处应能承受（）弯曲而不出现焊缝断裂情况。
A.45°
B.90°
C.180°
D.60°

[单项选择]The student I am teaching this year is much more intelligent than（）I taught last year.
A. that
B. one
C. the one
D. those

[单选题]70 岁，男性，急性心肌梗死在住院第 5 天突然在心尖区闻及 4/6 级返流性收缩期杂音，无震颤，其可能诊断是：
A.亚急性细菌性心内膜炎
B.乳头肌功能不全
C.室壁瘤
D.室间隔破裂
E.主动脉瓣关闭不全

[单项选择]有助于鉴别子宫肌瘤与子宫体癌的是（）
A. 子宫外形和大小
B. 肿块大小和密度
C. 肿瘤轮廓和边缘
D. 增强扫描的强化特征
E. 以上都不是

[单项选择]膨胀节能够防止设备间的管连接因变形而损坏是利用它的（）。
A. 弹性
B. 伸缩性
C. 热缩性
D. 冷缩性

[单项选择]重症肌无力最常合并
A. 多发性肌炎
B. 系统性红斑狼疮
C. 甲亢
D. 甲状腺肿瘤
E. 胸腺肿瘤或胸腺增殖

[多选题]下列对电子酸碱测试仪表述正确的是( )(中)
A..电子酸碱测试仪可以测量受污染区域内液体的酸碱值、电压、pH电极斜率
B..可以储存最多200多个数据
C..适用于灭火救援中各种污水和化学物质等的pH值的测量
D..电极清洗周期建议用户每年对电极进行清洗一次以及配合仪器校正

[不定项选择题]共用题干 第一篇

Plant Gas

Scientists have been studying natural sources of methane（甲烷，沼气）for decades but hadn't regarded plants as a producer, notes Frank Keppler, a geochemist（地球化学家）at the Max Planck Institute for Nuclear Physics in Heldelberg,Germany. Now Keppler and his colleagues find that plants,from grasses to trees,may also be sources of the greenhouse gas.This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment.
Previously,researchers had thought that it was impossible for plants to make significant amounts of the gas. They had assumed that microbes（微生物）need to be in environments without oxygen to produce methane.Methane is a greenhouse gas, like carbon dioxide.Gases such as methane and carbon dioxide trap heat in Earth's atmosphere and contribute to global warming.
In its experiments, Keppler's team used sealed chambers（室，房间；腔）that contained the same concentration of oxygen that Earth's atmosphere has.They measured the amounts of methane that were released by both living plants and dried plant material,such as fallen leaves.
With the dried plants,the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees C.At 30 degrees C.,they found,a gram of dried plant material released up to 3 nanograms（微克）of methane per hour(One nanogram is a millionth of a gram). With every 10-degree rise in temperature,the amount of methane released each hour roughly doubled.
Living plants growing at their normal temperatures released as much as 370 nanograms of methane per gram of plant tissue per hour. Methane emissions tripled when living and dead plant was exposed to sunlight.
Because there was plenty of oxygen available,it's unlikely that the types of bacteria(bacterium的复数，细菌）that normally make methane were involved. Experiments on plants that were grown in water rather than soil also resulted in methane emissions.That's another strong sign that the gas came from the plants and not soil microbes.
The new finding is an"interesting observation,"says Jennifer Y. King,a biogeochemist（生物地球化学家）at the University of Minnesota in St. Paul. Because some types of soil microbes consume methane,they may prevent plant-produced methane from reaching the atmosphere.Field tests will be needed to assess the plant's influence,she notes. Which statement is true of the methane emissions of plants in the experiment?
A.The lower the temperature,the higher the amount of methane emissions.
B.Living plants release less methane than dried plants at the same temperature.
C.When exposed to sunlight,plants stop releasing methane.
D.The higher the temperature,the greater the amount of methane emissions.

[单项选择]（）是企业通过工作分析、人力资源规划、员工招聘选拔、绩效考评、薪酬管理等一系列手段来提高劳动生产率，最终达到企业发展目标的一种管理行为。
A. 企业管理
B. 企业人力资源管理
C. 运营管理
D. 职能管理

[单项选择]女性，30岁。自然分娩一女婴，产后2日护士发现会阴侧切伤口红肿，局部湿热敷宜选择的溶液是（）
A. 75%酒精
B. 5%碘伏
C. 2%碘酊
D. 50%硫酸镁
E. 1：5000高锰酸钾