[单选题]零序电流III段保护动作时限的整定原则是A.从负荷侧算起逐级增加一个 时间级差B.从负荷侧降压变压器的高压侧算起逐级增加一个 时间级差C.与相邻线路的零序I段保护相配合D.与相邻线路的零序Ⅱ段保护相配合
[填空题]MCS-51有( )个中断源,有( )个中断优先级.
[名词解释]全面质量管理
[单选题]跨国公司的所有决策,以全公司在世界各地权益的统筹考虑为依据,这样的公司称( ) .A.民族中心型B.多元中心型C.全球中心型D.区域中心型
[填空题]电气设备的运用状态可分为( )、( )、( )和检修状态.
[单选题]商品是( )的矛盾统一体. A. 不变资本和可变资本 B. 私人劳动和社会劳动 C. 使用价值和价值 D. 社会必要劳动时间和个别劳动时间
[填空题]电介质电导不同于金属电导的区别是:电介质电导是__________电导.
[单选题]在绩效管理环节中起到承上启下作用的是A.绩效计划B.绩效实施C.绩效反馈D.绩效考核
[阅读理解]For some time past it has been widely accepted that babies and other creatures learn to do thingsbecause certain acts lead to rewards;and there is no reason to doubt that this is true.But it used also to be widely believed that effective rewards,at least in the early stages,had to be directly related to such basic physiologicaldrivesas thirst or hunger.In other words,a baby would learn if he got foodor drink or some sort of physical comfort,not otherwise.It is now clear that this is not so.Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.Papousek began his studies by using milk in the normal way torewardthe babies and so teachthem to carry out some simple movements,such as turning the head to one side or the other.Then henoticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response with clear signs of pleasure.So he began to study the children.s responses in situations where no milk was provided.He quickly found that children as young as four months would learn to turn their heads to right or left if the movementswitched ona display of lights-and indeed that they werecapable of learning quite complex turns to bring about this result.For instance,two left or two right,or even to make as many as three turns to one side.Papousek.s light display was placed directly in front of the babies and he made the interesting observation that sometimes they would not turn back to watch the lights closely although they would "smile and bubblewhen the display came on.Papousek concluded that it was not primarily the sight of the lights which pleased them,it was the success they were achieving in solving the problem,in mastering the skill,and that there exists a fundamental human urge to make sense of the world and bring it under intentional control.46.According to the author,babies learn to do things whichA.are directly related to pleasureB.will meet their physical needsC.will bring them a feeling of successD.will satisfy their curiosity47.Papusek noticed in his studies that baby.A.would make learned responses when it saw the milkB.would carry out learned movements when it had enough to drinkC.would continue the simple movements without being given milkD.would turn its head to right or left when it had enough to drink48.In Papusek.s experiment babies make learned movements of the head in order toA.have the lights turned onB.be rewarded with milkC.please their parentsD.be praised49.The babies wouldsmile and bubbleat the lights because_A.the lights were directly related to some basicdrivesB.the sight of the lights was interestingC.they need not turn back to watch the lightsD.they succeeded inswitching onthe lights50.According to Papusek,the pleasure babies get in achieving something is a reflection ofA.a basic human desire to understand and control the worldB.the satisfaction of certain physiological needsC. their strong desire to solve complex problemsD.a fundamental human urge to display their learned skills
[填空题]S7-200 CPU存储系统由RAM和 两种存储器构成,用以存储器用户程序、CPU组态(配置)、程序数据等.
[单选题]年名义利率8%按季计息,则计息期有效利率和年有效利率分别是A. 2.00%,8.00%B.2.00%,8.24%C.2.06%,8.00%D.2.06%,8.24%
[单选题]采用星-三角降压起动的电动机,正常工作时定子绕组接成( ).A.三角形B.星形C.星形或三角形D.定子绕组中间带抽头
[填空题]社会保障按保障对象分为社会保险、社会福利、社会救助和( ).
[单选题]铝活塞铸件在大批量生产时,选择何种铸造方法A.金属型铸造B.砂型铸造C.离心铸造D.熔模铸造
[问答题]论述调差系数表征的意义
[填空题]设a、b、c均为int 类型变量,则执行以下for语句后,c的值为 for(a=1,b=3;a<=b;a++)c=a+b;
[填空题]大型零售企业的经营需要( )和( )的支持.
[问答题]热电阻传感器主要分为哪两种类型
[多选题]网络计划中,关键线路的判定依据为( )A.总工期最短B.总时差最小C.自由时差最小D.时标网络图中无波形线的线路
[单选题]下列会计分录中,属于简单会计分录的是( )的会计分录A.一借多贷B.一贷多借C.一借一贷D.多借多贷
[单选题]变压器的纵差动保护___A.能反应油箱内部的故障B.只能反应油箱内部的故障C.不能反应油箱D.都不对