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[单选题]当飞机发动机启动后,旅客广播放大器的增益( )。
A.可手调增大0至3dB
B.可手调增大0至6dB
C.自动增大3dB
D.自动增大6dB

热门试题:

[单项选择]涂装工程施工安装技术规定,墙面刷涂料当高度超过( )时,要搭设马凳或操作平台。
A. 1m
B. 1.5m
C. 2m
D. 2.5m
[判断题]腐败的火腿必须用热碱水洗涤后才能食用。
A.正确
B.错误
[多选题]( )可以提高电力系统的供电可靠性
A.频率自动调节装置
B.电压自动调节装置
C.线路自动重合闸装置
D.低频减载装置
[单选题]160~2000km/h区段定位器坡度的限界为( )
A.1/10~1/3
B.1 / 10~1/5
C.1 /8~1/3
D.1/8~1/5
[多项选择]会给银行带来市场风险的表外业务工具主要包括()。
A. 期权
B. 期货
C. 远期利率协议
D. 互换
[填空题]基础的类型和构造与建筑物上部的______及它所采用的材料性能等因素有关。
[多选题]下列属于微波干燥技术适用场景的是?
A.A、投资预算低
B.干燥率要求高
C.加热速度要求高
D.具有热敏性的农副产品
[判断题]验酒机(液位检测模块)击打出低容酒的处理:低容酒应单独存放,集中处理。
[多选题]行政执法机关要在执法决定作出之日起20个工作日内,向社会公布()等信息,接受社会监督。
A.执法机关
B.执法对象
C.执法类别
D.执法结论
[单项选择]规费是指政府和有关权力部门规定必须缴纳的费用。但不包括( )。
A. 工程排污费
B. 社会保障费
C. 危险作业意外伤害保险
D. 环境保护费
[单项选择]火警发生时,令人致命的主要原因是?
A. 被人践踏
B. 窒息
C. 烧伤
[填空题]A considerable amount of medical research is aimed at identifying risk factors for disease. The rationale behind this work is that when people are informed of their risk, they will happily change their behavior to lower that risk. (51) this is certainly a reasonable assumption, it turns out that things are not quite that simple and straightforward. First of all, health is not necessarily a top priority in everyone’s life and, for these people, changing behavior in the interests of health may interfere (52) other, more important matters. Second, the benefits to be derived (53) such changes rarely are immediate or obvious. Usually, improvements in health take place over long periods of time and are quite subtle. (54) , we are all so bombarded with information about the thousands of health hazards to which we are exposed (55) most of us "time out" much of this information. This latter issue is compounded by the fact that much of new information
[判断题] (判断题) 依据《胜利油田承包商 HSSE监督管理办法》,非公开招标工程项目在确定承包商或确定拟邀请承包商前,建设单位项目主管部门应当组织有关专业部门,对其进行安全环保资质审查,对符合条件的承包商办理相关手续。 ( )
A.正确
B.错误
[单选题]联轴器的装配要求在一般情况下应严格保证两轴的同轴度。
A.滑块式
B.凸缘式
C.万向节
D.十字沟槽式
[判断题]串级控制系统投用过程中,当副回路自动运行稳定,主变量等于设定值时,可以将主调节器由手动无扰动切向自动。( )
A.正确
B.错误
[单项选择]急性梗阻性化脓性胆管炎导致的休克,其处理原则是()
A. 先抗休克,再进行手术
B. 抗休克同时,手术解除胆道梗阻
C. 控制感染,病情稳定后进行手术
D. 紧急手术
E. 限期手术
[单项选择]汽车行驶中,发动机的有效功率经传动系统至驱动轮,在动力传动过程中,有一部分功率消耗于克服传动系各机件的摩擦。传动系的机械效率一般为()。
A. 65%---75%
B. 75%---85%
C. 85%---92%
[单选题]嗜神经病毒(流行性乙型脑炎病毒)最好接种于小鼠的部位是
A.鼻内
B.皮内
C.脑内
D.腹腔内
E.静脉
[单选题]继电保护、安全自动装置及自动化监控系统做传动试验或一次通电或进行直流输电系统功能试验时,应通知运维人员和有关人员,并由( )或由他指派专人到现场监视,方可进行。
A.工作许可人
B.工作负责人
C.运维负责人
D.专责监护人
[判断题]自动化仪表按能源分为气动仪表、电动仪表和液动仪表。
A.正确
B.错误
[单项选择]网布的粗化是采用()
A. 砂石粉
B. 玻璃砂
C. 细金钢砂
D. 树脂胶
[多选题]下列属于烷化剂类抗肿瘤药物的是( )
A.顺铂
B.氟尿嘧啶
C.环磷酰胺
D.卡莫司汀
E.甲氨蝶呤
[单选题]签约的公务卡需为本法人行发起开立的()。"
A.金农卡
B.信用卡
C.易贷卡
D.借记卡"
[单项选择]登记的证券帐户长度必须是()位
A. 12
B. 15
C. 18
D. 19
[简答题]某测绘单位受某公司的委托,承接其花园小区的房产测绘工程。小区共有建筑27栋,建筑总面积约10万平方米,其中包括1栋多功能综合楼、26栋住宅楼。主要工作内容包括房地产平面控制测量、房产调查、房产要素测量、房产图绘制、房产面积测算、房产分户。
问题:
简述房屋面积测算的工作内容。
[单项选择]孕妇,32岁,G3P0,因孕过期入院待产。检查:血压16/107kPa(120/80mmHg),宫高35cm,胎方位LOA,胎心130次/分,拟行胎盘功能测定,下列哪项表示胎盘功能减退()
A. 12小时胎动次数≥20次
B. B超羊水池最大直径≥3cm
C. 血清胎盘生乳素≥4μg/L
D. NST试验有反应型
E. OCT试验胎心出现连续晚期减速
[单选题]二冲程柴油机扫气口打开时,允许缸内压力稍高于或等于扫气压力的主要出发点是()。
A.减小气口高度,使行程失效系数减小,提高气缸利用率
B.增加膨胀功
C.防止缸内废气倒冲
D.A+B
[单项选择]哪些不是重症病毒性心肌炎()
A. 阿斯综合征发作
B. 严重充血性心力衰竭
C. 心源性休克
D. 持续性室速
E. 心电图广泛T波低平
[多选题]新修订的《安全生产法》中规定:生产经营单位不得()、()直接关系生产安全的监控、报警、防护、救生设备、设施,或者篡改、隐瞒、销毁其相关数据、信息。
A.关闭.
B.修改
C.破坏.
D.拆除
[判断题]基层单位是国家综合性消防救援队伍的基础,是遂行防火灭火、应急救援、监督执法、执勤、训练、科研、保障等任务的基本单位。( )
A.正确
B.错误
[单项选择]

During the 9th century scientists found that when certain parts of the brain of a man were (36) , he would lose the (37) to do certain things. And so, people thought that each part of the brain does a different (38) . But modern research has (39) out that this is not so, for it is not (40) to say (41) what each part of the brain does.
In the past fifty years there (42) a great increase in the amount of research (43) on the brain. Chemists and biologists have (44) that the (45) the brain works it is not so (46) as people in general may think. Chemists tell us that 100,000 chemical changes (47) in the brain every second. Some recent researches also (48) that we can remember everything (49) happens (50) us. We (51) not be able to recall (回忆) the things we’ve heard and seen, but it is all kept there in the storehouse of the human mind.

A. quicker
B. bigger
C. slower
D. smaller

[单项选择]每克葡萄糖可提供的热能是
A. 4.184kJ (1kcal)
B. 16.736kJ (4kcal)
C. 25.104kJ (6kcal)
D. 37.654kJ (9kcal)
E. 41.84kJ (10kcal)
[单项选择]

Most young people enjoy physical activities, walking, cycling, football, or mountaineering.
These who have a passion (26) climbing high and difficult mountains are often (27) with astonishment. Why are men and women (28) to suffer cold and hardship, and to (29) on high mountains This astonishment is caused, probably, by the difference between mountaineering and other forms of activities (30) which men give their leisure.
There are no man-made rules, as there are for (31) games as golf and football. There are, of course, rules of different kinds which it would be dangerous to (32) , but it is this freedom from man-made rules (33) makes mountaineering attractive to many people. Those who climb mountains are free to use their own (34) .
If we (35) mountaineering with other more familiar sports, we might think that one big difference is (36) mountaineering is not a
A. unusual
B. normal
C. common
D. strange

[多选题]《中铁建工集团山东有限公司低成本运营实施细则》中以下零星用工控制目标为不应发生的( )。
A.临设零工
B.防护安拆维护
C.临时水电布置
D.卫生清理
E.地表降排水
[单选题]突然剧烈腹痛,全腹压痛、反跳痛。应首先考虑的是
A.急性胃炎
B.消化道溃疡穿孔
C.急性肝炎
D.右肾结石
E.机械性肠梗阻
[单选题]拆装、检修制动装置配件时,必须先截断( ),排净余风,方能作业;作业结束后要恢复开通位置。
A.电源
B.水源
C.风源
D.故障
[多选题]犯罪未遂的构成特征包括
A.A行为人已经着手实行犯罪
B.B犯罪未得逞
C.C犯罪未得逞是由于犯罪分子意志以外的原因
D.D犯罪结果已经出现

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