热门试题:
[单项选择]Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man.
They do not provide energy, (21) do they construct or build any part of the body. They are needed for (22) foods into energy and body maintenance. There are thirteen or more of them, and if (23) is missing a deficiency disease becomes (24)
Vitamins are similar because they are (25) of the same elements--usually carbon, hydrogen, oxygen, and (26) . nitrogen. They are different (27) their elements are arranged (28) , and each vitamin (29) one or more specific (30) in the body.
(31) enough vitamins is essential to life, (32) the body has no nutritional use for (33) vitamins. Many people, (34) , believe in being on the "safe side" and thus take extra vitamins. However, a (35) diet will usually meet all th
A. made
B. done
C. consist
D. compose
[单项选择]气虚便秘的治法为()
A. 行气通便
B. 润肠通便
C. 益气润肠
D. 温阳通便
E. 理气导滞
[单项选择]Pannonia Enterprises, Inc. (PEI) has a target capital structure of 40% debt with 60% equity. PEI’s pretax cost of debt will remain at 9% until the firm raises more than $200000 in new debt capital, at which point its pretax cost of debt will increase to 9.5%. PEI’s cost of equity will increase when more than $ 400000 in equity capital is raised. Which of the following choices is closest to PEI’s break point for debt capita()
A. $ 200000.
B. $400000.
C. $500000.
[单选题]遇天气恶劣,信号机显示距离不足( )时,车站值班员须立即报告列车调度
员,改按天气恶劣难以辨 认信号的办法行车。
A.400m
B.600m
C.800m
D.200m
[单选题]作业负责人站班会上通过读票方式进行安全交底,并随机抽取()名至5名施工人员提问,被提问人员清楚且回答正确后开始作业。
A.1
B.2
C.3
D.4
[单选题]下列不属于楼层火灾救人操训练要求与注意事项的是( )。
A.参训人员防护装备齐全,并携带通信器材
B.救人过程中2支水枪交叉进行掩护的距离不限
C.人员救出后要立即进行急救或交给医务人员
D.救人过程中2支水枪进行掩护距离不超过3米
[多选题] 通常QoS 提供以下几种服务模型( )
A. Best-Effort service
B. Integrated service
C. Differentiated service
[单项选择]地形以平原为主的是()
A. 亚洲
B. 北美洲
C. 大洋州
D. 欧洲
[单项选择]According to the psychologists, a compulsive spender is one who spends large amounts of money ______.
A. and takes great pleasure from what he or she buys
B. in order to satisfy his or her basic needs in life
C. just to meet his or her strong psychological need
D. entirely with an irrational eagerness
[多选题]施工单位应当建立( )等安全管理制度,评估安全隐患风险,落实治理责任.
A.安全生产责任制度
B.安全教育培训
C.安全隐患排查治理
D.重大危险源监管
E.领导带班
[判断题]对运行中的GIS组合电器,定期检查可以不断电进行,设备不需抽真空。
A.正确
B.错误
[单选题]镇与乡同为我国的基层政权组织,实行直接管理群众性自治组织(村民委员会、居民委员会)的体制,是实现城乡统筹的关键点,是依据我国( )设立的。
A.宪法
B.刑法
C.民法
D.行政法
[填空题]充电电阻Rc两端并联了过压保护电路,保证辅助发电机电压过高或充电电流超过( )时,自动转入固定发电工况。
[单项选择]
The population of the United States is only 6% the world’s population, but Americans (1) one third of all the energy (2) in the world. This fact alone says that Americans need to use less energy. And because the price of energy had been rising very rapidly (3) the limited supplies of oil in particular, Americans are becoming aware to the need to (4) energy. In California we have a California Energy Commission which has set up in the past five years to (5) plan for our future energy rise. We have (6) laws in California to help us conserve energy. First of all, our houses in California have been very (7) of energy in the past. They were not (8) very carefully and so the heat would go out of the house very rapidly. Now we require that the homes have a (9) level of insulation, and so the homes built now are much more (10)
(11) , in transportation (12) a large percen
A. transportation
B. travel
C. energy
D. automobiles
[单项选择]关于髂嵴间径正确的是:
A. 推测骨盆入口横径的长度
B. 推测骨盆入口前后径的长度
C. 推测中骨盆横径的长度
D. 推测中骨盆前后径的长度
E. 推测骨盆出口横径的长度
[多项选择]信一代核心系统中机构管理仅涉及()等基本交易,系统维护等全部为后台维护。
A. 机构扎帐
B. 机构签到
C. 机构签退
D. 状态查询
[单选题]通信是传递()的工具和手段。
A.频率
B.电能
C.信息
D.数字
[多项选择]门市、摊亭销售服务的工作要求有()
A. 提供适销对路的品种
B. 出版物品种齐全、补充及时
C. 主动、热情、耐心、周到的服务艺术
D. 遵守职业,全心全意为消费者服务
E. 服务设施完备
[单选题]小明性格内向,不敢向他人请教问题,当他鼓起勇气和同学交流时,教师立刻对他给予表扬。教师采用的这种行为改变方法是( )。
A.强化法
B.代币奖励法
C.示范法
D.行为塑造法
[单选题]隧道的种类很多,但与灭火工作关系密切的,一般是( )。
A. 煤矿隧道
B. 涵洞隧道
C. 桥梁隧道
D. 交通隧道
[单选题]急性肾衰竭少尿期一般持续
A. 5~7天
B. 6~9天
C. 7~14天
D. 14~20天
E. 20~28天
[单选题]两个电阻并联,R1=2Ω,通过的电流为5A,R2=4Ω,通过的电流应是( )。
A.8A;
B.3.5A;
C.10A;
D.2.5A。
[判断题]( )单流阀试不起压可能是密封面损坏、密封圈损坏或密封面有异物的原因。
A.正确
B.错误
[单选题]C提供()
A.对发动机的人工控制
B.对飞行舵面的自动控制
C.对发动机的自动控制
[单选题]油罐底发生漏油时,应采用( )垫层的方式将损失减少到最低。
A.压油
B.注水
C.捣油
D.边压边用
[填空题]It is advisable to accept whatever qualities you share with your mother.
[判断题]3.289. 第289题
测量输电线路零序阻抗时将线路末端三相短路接地,始端三相短路接单相交流电源()。
A.正确
B.错误
[判断题]机场主轴润滑系统中的空气过滤器必须每周检查。
[判断题]听觉信号,长声为3s,短声为1s,音响间隔为1s。重复鸣示时,须间隔5s以上。()
A.正确
B.错误
[单项选择]扩孔时的切削速度一般为钻孔时的(),进给量为钻孔时的1.5~2倍。
A. 1/4
B. 1/2
C. 15倍
D. 2~3倍
[单选题]被评估甲设备为3年前购置,预计评估基准日后甲设备与同类新型设备相比每年运营成本增加10万元,甲设备尚可使用8年,若折现率为10%,企业适用所得税税率为25%,不考虑其他因素,则甲设备的功能性贬值额最接近于( )万元。
A.5.34
B.25.38
C.40.01
D.53.35
[单项选择]某伤寒患者可选下列何组药治疗
A. 四环素、青霉素
B. 氯霉素、青霉素
C. 氯霉素、氨苄西林
D. 氨苄西林、四环素
E. 红霉素、羧苄西林
[单项选择]单胺能神经递质包括()
A. 5-HT
B. NE
C. DA
D. 以上均是
E. 以上均不是
[单选题]新八轴HXD2型电力机车升弓前,首先确定总风缸压力在650kpa以上。若不满足,到气动柜前查看辅助风缸压力表,若显示的风缸压力值低于( ),则使用辅助压缩机启动打风。
A.450kpa
B.480kpa
C.550kpa
D.650kpa
[单项选择]肝癌的组织学类型,最多见的是()
A. 肝细胞型
B. 胆管细胞型
C. 结节型
D. 弥漫型
E. 混合型
[单选题]烟叶工作一般以()为单位,平均收购量在10000担以上的行政区域设置1个烟站,收购量在5000担以上设置1个烟叶收购点。
A.乡政府
B.镇政府
C.基地单元
D.行政区域