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[单选题]化水装置超滤在线化学清洗时使用的药剂为( )。
A.盐酸和柠檬酸
B.氢氧化钠和次氯酸钠
C.EDTA和氢氧化钠
D.十二烷基苯磺酸钠H和氢氧化钠

热门试题:

[单选题](44910)双线区段线桥工区应配备的停车信号牌、减速信号牌、减速地点标、“T”字减速信号的数量为( )。(1.0分)
A.2个
B.4个
C.6个
D.8个
[单选题]ZD6型电动转辙机自动开闭器动接点打入静接点后,用手扳动动接点,其旷动量不大于()
A.2mm
B.2.5mm
C.3mm
D.3.5mm
[单选题]转K5型转向架组装时,下旁承调整垫板总厚度( )mm。
A.2~12
B.2~25
C.2~30
D.2~40
[多选题]下列关于缺省路由的说法正确的有?( )
A.如果报文的目的地址不能与路由表的其他任何路由条目匹配,那么路由器将会根据缺省路由转发该报文
B.在路由表中,缺省路由以到网络 0.0.0.0(掩码也为 0.0.0.0)的路由形式出现
C.如何一台路由器的路由表中必须存在缺省路由
D.缺省路由只能有管理员手工配置
[单选题]持有( )级以上证书人具有向工务段提报LKJ数据资格。
A.A
B.B
C.C
D.D
[判断题] 为防止降低摩擦系数而影响了回转阻力矩的产生,从而导致车辆在低速时蛇行失稳,因此提速转向架规定在承载鞍与导框顶部等须涂抹润滑脂。 ( )
A.正确
B.错误
[单选题]6KV 电压等级下操作人员与电气设备裸露带电部分的最小距离为( )m。
A.0.5
B.0.6
C.0.7
D.0.8
[单选题]在超密集组网的场景中,()是解决边界效应的关键。
A.回传技术
B.软扇区
C.小区虚拟化
D.全频谱接入
[单选题]摇枕斜楔槽内、外表面距离原型为146+3 -1,磨耗后大于( )时,对中焊修后磨平,恢复原型。
A.150mm
B.151mm
C.152mm
D.153mm
[简答题]“始发列车检查范围和质量标准”:钩舌销及开口销无折断、( )。
[单项选择]The HomesteadAet of 1862 gave heads of families or individuals aged twenty-one or older the right to own 160 acres of public land in the western United States after five years of residence and improvement. This law was intended to provide land for small farmers and to prevent land from being bought for resale at a profit or being owned by large landholders. An early amendment to the act even prevented husbands and wives from filing separate claims. The West, land reformers had assumed, would soon contain many 160-acre family farms.
They were doomed to disappointment. Most landless Americans were too poor to become farmers even when they could obtain land without cost. The expense of moving a family to the ever-receding frontier exceeded the means of many, and the cost of tools, draft animals, a wagon, a well, fencing, and of building the simplest house, might come to $1,000--a formidable barrier. As for the industrial workers for whom the free land was supposed to provide a safety
A. To make larger tracts of land available to small farmers.
B. To settle Kansas, Nebraska, and the Dakotas.
C. To encourage land speculation west of the Mississippi.
D. To increase the variety of trees growing in the western states.
[单选题]各单位要按照( )总体原则,进一步完善协议匹配执行规则。
A.进度均衡
B.进度超前
C.控制进度
D.适当超前
[单选题]贷款的展期期限加上原期限达到新的利率期限档次时,从( )起,贷款利息按新的期限档次利率计收。
A.展期之日
B.展期之日次日
C.展期之日后两日
D.展期之日后三日
[判断题]允许同步发电机在未励磁的情况下,先由原动机将发电机转速升至额定转速附近,合上主隔离开关,再给上励磁电流,依靠自同步转矩将发电机拉入同步。( ) [1分]
A.正确
B.错误
[填空题]"Look, it’s Baldy!" A boy shouted in my direction across the playground. Even though I was used to regular insults(侮辱) because of the ____11____ on my hed, it was ____12____ horrible to hear. I sighed as I headed back to the class.   When I was just 20 months old, I suffered serious ____13____ after a bowl full of hot oil fell on my head. I was ____14____ to hospital and had to say there for weeks while the doctors ____15____ to save my life. "Holly’s very ____16____ to be alive," they told Mum and Dad. "But she’ll be ____17____ with scars on her head, and of course her hair won’t grow there."   As a child, I cared much about my scars, so I ____18____ wore a scarf to cover them up when I left home.____19____ I didn’t, people would call me horrible names like Baldy. Although my friends were always comforting me ,they never ____20____ understood how it felt.   Then through the hospital I was ____21____ to a children’s burns camp, where children like me can get any help. There, I
A. A.hide
B.give
C.keep
D.put

[单项选择]()在暖色的衬映下,会显得更加冷艳。
A. 绿色
B. 白色
C. 蓝色
D. 冷色
[简答题]常用的滚动轴承润滑剂主要有哪两类。
[单项选择]京大戟主治()
A. 小便不利、水肿臌胀
B. 胸胁停饮、水肿臌胀
C. 大便秘结、水肿臌胀
D. 胃肠积滞、水肿臌胀
E. 寒实结胸、水肿臌胀
[简答题]汽提塔塔底液位超高有哪些处理方法?
[多选题]冬季五防是指( )和防煤气中毒。
A.防冻
B.防火
C.防爆
D.防水
E.防滑
[判断题]生产经营单位对非本单位原因造成的事故隐患,应当及时向所在地负有安全生产监督管理职责的部门报告。( )
A.正确
B.错误
[单选题]《中国南方电网有限责任公司基建管理办法》第5.1.3条的规定,( )应监督指导施工承包商安全风险辨识、评估和安全风险控制措施的制定和实施,重点关注中风险及以上的风险管控。
A.施工项目部
B.监理项目部
C.基建项目部
D.建设单位
[单选题]在带电作业过程中如设备突然停电,应视设备仍然带电,工作负责人应及时与( )联系。
A.线路运行维护单位
B.调度
C.A.B两者均可
D.以上都不正确
[单选题]生态系统是由生物群落及其生存环境共同组成的( )。
A.静态平衡系统
B.动态平衡系统
C.平衡态平衡系统
D.固态平衡系统
[单选题]发动机一般每工作( )应更换滤清器。
A.500h
B.200h
C.100h
D.400h
[单项选择] Heart Attack In the United States, and especially in big cities and rural areas, tens of thousands of people with hearts that should be good 【51】 to keep them alive die each year for lack of adequate first aid. In New York City, for example, a new study has shown that only one person in 100 outside of hospitals 【52】 after the heart suddenly stops pumping. In contrast, in Seattle, the survival 【53】 after such heart attacks is one in five. "The difference can be traced 【54】 the effectiveness of the chain of survival", Dr. Joseph P. Ornato said. " Each link in the 【55】 must be strong enough for many lives to be 【56】 ". The chain begins with an immediate telephone 【57】 for emergency help and the start within four minutes of the process needed for restarting the 【58】 working, by a family member or bystander (旁观者). It continues with the prompt arrival-------within eight 【59】 ten minutes of a rescuer equipped with a special instrument that
A. without
B. at
C. with
D. by
[单选题]直接接触设备的电气测量,可单人进行。
A.正确
B.错误
C.略
D.略
E.略
F.略
[单选题]下列不是无排卵型功能失调性子宫出血临床表现的是
A.多发生于青春期或围绝经期
B.月经周期无一定规律性
C.月经周期正常
D.经期长短不一
E.经量时多时少
[单选题]成人心肺复苏时打开气道的最常用方式为(   )  。
A.4
B.5
C.6
[名词解释]高压开关
[单选题]在场(厂)区道路交通标志中,禁止或限制场车、行人交通行为的标志:是( )
A.指示标志
B.禁令标志
C.指路标志
[单项选择]科学家们发现,一种曾在美洲普遍栽培的经济作物比目前的主食作物如大米和小麦,含有更高的蛋白质成分。科学家们宣称,推广这种作物,对那些人口稠密、人均卡路里和蛋白质摄入量均不足的国家是很有利的。
下列哪项如果为真,最能对科学家的宣称产生质疑
A. 这种作物的亩产量大大低于目前主食作物的亩产量。
B. 许多重要的食物,如西红柿,都原产于美洲。
C. 小麦蛋白质含量比大米高。
D. 这种作物的卡路里含量高于目前主食作物的含量。
[简答题]简述农业对国民经济的贡献表现在哪些方面?
[单选题]有关流行性乙型脑炎的主要病理变化, 哪项是错误的
A.神经胞的变性坏死
B.筛状软化灶形成
C.淋巴细胞套袖状浸润
D.病变以小脑、延髓和脑桥最严重
[单选题]- Do you think this is a nice place? ______
A. That's all right.
B. You're well.
C. No, it's not here.
D. Yes, I think so.
[单选题]在串联电路中各个电阻通过的()都是相同的。()
A.电压
B.电量
C.电流
D.功率
[单选题]购买经济适用住房满( )年,可以通过相关法定程序取得完全产权。
A.2
B.3
C.4
D.5

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