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题目详情:

[简答题]制氢设备开机前为什么要对系统进行充氮?

热门试题:

[单项选择]关于Wernicke脑病说法不正确的是()
A. 大量补充维生素B1可使眼球的症状和记忆障碍很快消失
B. 表现为眼球震颤、眼球不能外展和明显的意识障碍
C. 一部分患者转为柯萨科夫综合征,成为不可逆的疾病
D. 往往伴有定向障碍、记忆障碍、震颤谵妄等
E. 是由于维生素B缺乏所致
[判断题]可动心轨无缝道岔的钢轨接头除绝缘接头采用胶接绝缘接头外,其余接头应全部焊接。
A.正确
B.错误
[单项选择]凡购买集中度高,单位产品利润高的企业适合与顾客建立()关系。
A. 主动型
B. 伙伴型
[单项选择]What our society suffers from most today is the absence of consensus about what it and life in it ought to be. Such consensus cannot be gained from society’’s present stage, or from fantasies about what it ought to be. For that the present is too close and too diversified, and the future too uncertain, to make believable claims about it. A consensus in the present hence can be achieved only through a shared understanding of the past, as Homer’’s epics (史诗) informed those who lived centuries later what it meant to be Greek, and by what images and ideals they were to live their lives and organize their societies.   Most societies derive consensus from a long history, a language all their own, a common religion, common ancestry. The myths by which they live are based on all of these. But the United States is a country of immigrants, coming from a great variety of nations. Lately, it has been emphasized that an asocial, narcissistic ( 自我陶醉的 ) personality has become characteristic of Ameri
A. an earnest nationalist.
B. an advanced psychologist.
C. a radical reformer.
D. a social historian.
[单项选择]血小板数量为15×109/L的初诊ITP首选治疗是()
A. 静脉应用丙种球蛋白
B. 脾脏切除
C. 肾上腺皮质激素
D. 环孢素
E. 止血药物
[单选题]各部门尽快组织相关成员进行清雪,铲除路面结冰,( )必要时可洒融雪剂和工业盐。洒过融雪剂和工业盐的积雪.冰块( )堆放路两侧草坪。
A.小雪.中雪,可以
B.小雪.中雪,不得
C.大雪.暴雪,可以
D.大雪.暴雪,不得
[单项选择]下列对光合作用和呼吸作用过程的相关叙述中正确的是()
A. 人体细胞呼吸产生的CO2均来自有氧呼吸
B. 光合作用14CO2中的14C首先经C5再到(CH2O)
C. 两过程产生的[H]是同一种物质且去路相同
D. 植物叶肉细胞中发生的光合作用与呼吸作用互为逆过程
[判断题]济南某报关公司(未办理跨关区分支机构,在济南海关办理了报关注册),经常接受济南地区的进出口公司的委托,在济南以外的威海、烟台、青岛海关办理报关纳税,这种行为属于非法报关。 ( )
[单选题]党的十九大指出,经过长期努力,中国特色社会主义进入了新时代,这是我国发展( )。
A.新的历史阶段
B.新的历史时代
C.新的历史时期
D.新的历史方位
[单选题]自动往返控制行程控制线路需要对电动机实现自动转换的( )控制才能达到要求
A.自锁
B.点动
C.联锁
D.正反转
[填空题]Some people believe that you have to be a special kind of person to sell a product. But although it is clear that a successful salesman does need special talents, and a{{U}} (36) {{/U}}personality, many of the skills he uses are used by us all: we build and{{U}} (37) {{/U}}relationships with different kinds of people, and we listen to and take{{U}} (38) {{/U}}of what they tell us and don’t just enjoy the sound of our own{{U}} (39) {{/U}} A firm may depend on their own sales team and/or on the salesmanship of their distributors, wholesalers or{{U}} (40) {{/U}}. But any company needs to establish a personal relationship with its major clients (’key accounts’) and potential customers (’{{U}} (41) {{/U}}’). It is often said that people do business with people. A firm doesn’t just{{U}} (42) {{/U}}impersonally with another firm, but a person in the buying department receives personal visits from people{{U}} (43) {{/U}}the firm’s suppliers on a regular basis or in the case
[多选题]单位商品的价值量和生产这种商品的 (  ) 
A. 劳动生产率成正比
B. 社会必要劳动时间成正比
C. 劳动生产率成反比
D. 社会必要劳动时间成反比
[多选题]在使用带电清扫机械进行清扫前,应确认( )。
A.清扫机械工况(电机及控制部分、软轴及传动部分等)完好
B.绝缘部件无变形、脏污和损伤
C.毛刷转向正确
D.清扫机械已可靠接地
[单选题]为老年人调配手杖时,把手的高度应该与()的高度一致。
A.大转子
B.髋骨
C.髌骨
D.坐骨
E.鹰嘴
[单选题]对接焊缝的焊趾处,应力集中系数可达1.6,所以国家有关标准中规定焊缝余高应在( )之间,不得超出。
A.0~3mm
B.0~4mm
C.0~5mm
D.1~4mm
[单选题]下列关于肺心病的发病机制,错误的是( )
A.肺小动脉玻璃样变
B.肌型小动脉中膜增厚
C.肺小动脉弹力纤维增生
D.无肌型细动脉肌化
[单项选择]对于羊水,下列哪项恰当()
A. 若含肌酐应视为病态
B. 中性偏酸
C. 在羊膜腔内静止不动
D. 妊娠38周羊水最多
E. 羊水于妊娠未期无色透明
[判断题] Beads, stones, seashells, paper, precious metals such as gold and silver, base metals such as iron have all been used as money. Today, money is printed on paper. A lot of countries use their own currency, with n ames such as dollar, pound, franc, ruble, yuan and so on. Since 2002, 18 of the EU members have replaced their national currencies by Euro notes and coins. If you want to pay for something in another currency, you have to change your money into the other money. If you want to travel outside your native country, you need to change your own country's money for the money of the country you are visiting. Most large banks sell foreign currencies. You can exchange money at a bank or at an office of a tourist agency Wherever you go, exchanging money puts you in touch with international finance, which is concerned with exchange rates between different currencies. Deciding the rate for the international exchange of money is one of the most complex aspects of international banking. Foreign exchange rates have significant impact on the economy of a country.
[单项选择]属于血管紧张素Ⅱ受体AT1亚型拮抗药的是
A. 依那普利
B. 吡那地尔
C. 洛沙坦
D. 酮色林
E. 特拉唑嗪
[单项选择]按子项目组成编制施工成本计划,首先要把项目总施工成本分解到( )。
A. 单项工程和单位工程中
B. 单体工程和单项工程中
C. 分部工程和分项工程中
D. 单项工程和分部分项工程
[单选题]施工现场的电焊机应根据施工区需要而设置。多台电焊机集中布置时,应将电焊机和控制刀闸作对应的编号。电焊机一次侧电源线不得超过(  )m,二次侧引出线不得超过 30m。一、二次线应布置整齐,牢固可靠。
A.5
B.6
C.7
D.8
[多项选择]为了确保客户登录个人网上银行的安全性、方便性以及个性化选择,个人网上银行向客户提供了如下哪种登录方式。()
A. 网上银行登录密码+注册卡/账号
B. 网上银行登录密码+用户名
C. U盾密码+用户名
D. 银行卡密码+用户名
[填空题]为了便于区分和应用,各种钢材应有()即涂色和打钢印。
[多选题]如遇以下()工作时,需选用紧急抢修工作票。
A.紧急缺陷的抢修工作
B.需要紧急处理的故障停运设备设施的抢修工作
C.灾后抢修工作
D.灾后抢修工作间断后超过12小时复工
[简答题]独立自主性是指?
[多选题]深度学习框架主要有()。
A.Tensorflow
B.Pytorch
C.Caffe
D.Mxnet
E.java
F.Darknet
[单选题]稳压管稳压电路中,稳压二极管工作在( )。
A.正向导通区
B.正向死区
C.反向击穿区
D.反向截止区
[单项选择]当制冷剂含有水分时会出现()现象
A. 脏堵
B. 冰堵
C. 油堵
[判断题]管制单位应当根据实际情况制定适用于本单位的航空器紧急情况处置程序及检查单,作为 处理航空器紧急情况的依据
A.正确
B.错误
[多项选择]联合用药的适应证
A. 病因未明的严重感染
B. 单一抗菌药不能控制的严重感染
C. 使毒性较大药物的毒性减少
D. 长期用药细菌可能产生耐药性
E. 腹膜炎及胸、腹严重创伤后
[单项选择]What does the woman mean
A. The clerk doesn’t like to be bothered.
B. The machine was just repaired.
C. She can teach the man to operate the machine.
D. The man shouldn’t make any more copies.
[单项选择]移动通信标准TD-LTE与FDD-LTE的区别是()
A. 频率的利用方式不同
B. 频分上下行信道的方式不同
C. 采用的调制方式有区别
D. 拥有专利技术的厂家不同
[判断题]隔爆性开关中装有的RC阻容吸收装置是过电压保护装置。()
[单选题]听觉停车信号.喇叭 (口笛) 吹( )短声 ( )
A.一
B.二
C.三
D.连续
[单项选择]前壁心肌梗死并发短阵室速()
A. 地尔硫(硫氮酮)
B. 洋地黄
C. 阿托品
D. 利多卡因
E. 胺碘酮
[单选题]建筑节能是在( )的条件下,尽可能降低能耗。
A.A.满足建筑基本需要;
B.保证建筑的舒适性;
C.无节制使用;
D.尽量不使用能源
[单选题]自锚式斜拉桥的最大拉索索力是在( )
A.0 号索
B.端锚索
C.地锚索
D.辅助墩处拉索
[单选题]间接导致事故发生,承担事故发生或扩大次要原因的责任者,包括一定责任和连带责任等,是指( )。
A.主要责任
B.同等责任
C.次要责任
D.一般责任
[单选题]离开特种作业岗位达()以上的特种作业人员,应当重新进行实际操作考核,经确认合格后方可上岗作业。
A.3个月
B.半年
C.一年
D.两年

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