更多“我国恶性肿瘤的主要危险因素是（）”相关的问题
下列最易合并坐骨神经损伤的是
A. 股骨颈骨折 B. 股骨转子间骨折 C. 髋关节前脱位 D. 髋关节后脱位 E. 胫腓骨骨折
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在Windows "资源管理器"窗口右部选定所有文件,如果要取消其中几个文件的选定,应进行的操作是( )
A . 依次单击各个要取消选定的文件B . 按住Ctrl键,再依次单击各个要取消选定的文件C . 按住Shift键,再依次单击各个要取消选定的文件D . 依次右击各个要取消选定的文件
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影响声波在岩体中传播速度的岩体物理性质主要有（）。
A . 岩石种类
B . 岩石含水量
C . 岩石风化及裂隙发育程度
D . 岩石密度和孔隙率
E . 岩石表面粗糙程度
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For some time past it had been widely accepted that babies—and other creatures—learn to do things because certain acts lead to "rewards"; and there was 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 physiological(生理的) "drives" as thirst or hunger. In other words, a baby would learn if he got food or 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 to "reward" the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed 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 movement "switched on" a display of lights—and indeed that they were capable 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 bubble" when 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.
For some time past it had been widely accepted that babies—and other creatures—learn to do things because certain acts lead to "rewards"; and there was 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 physiological(生理的) "drives" as thirst or hunger. In other words, a baby would learn if he got food or 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 to "reward" the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed 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 movement "switched on" a display of lights—and indeed that they were capable 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 bubble" when 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.
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设有下列程序：（） 该程序的运行结果是
设有下列程序：（）
该程序的运行结果是
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生产与运作管理研究对象是（）
A.产品或服务的生产
B.顾客的需求
C.生产运作过程和生产与运作系统
D.生产与运作系统
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根据IS-LM模型,引起沿着总需求曲线向上移动的原因是()
A. 自发支出不变，名义货币供给不变，物价水平上升 B. 自发支出不变，名义货币供给不变，物价水平下降 C. 名义货币供给和物价水平不变，自发支出增加 D. 名义货币供给和物价水平不变，自发支出减少
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1月1日，A市的甲公司与B市的乙公司签订一项协议，协议约定：甲公司将2吨工业盐出售给乙公司，价款1万元，1月15日前交货付款。1月10日，甲将工业盐交给丙运输公司负责运送。1月12日，货物在运输途中因遭遇山洪全部灭失。甲乙对交货地点、费用承担等未作其他约定，且事后未能达成其他有效协议，则根据合同法律制度的相关规定，下列表述正确的有()
A . 履行费用应由甲公司承担
B . 标的物灭失的风险应由甲公司承担
C . 标的物的所有权属于甲公司
D . 甲公司可以在1月15日之前的任何时间交付货物
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实验过程中取血应注意：（）
A.松开动脉夹，立刻接取血液
B.取血后静置分离血清
C.用注射器抽取血液0.5～1.0ml
D.取血后应不必用生理盐水少许冲洗动脉插管
E.取血时必须严防溶血
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根据我国的《婚姻法》，三代以内的旁系血亲（）。
A.禁止结婚
B.可以依照习惯结婚
C.允许结婚但不能生子
D.可以结婚
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《动车组列车服务质量规范》被芯、枕芯先加装包裹套，再使用被套、枕套。
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注册会计师将从被审计单位或其他第三者获取的资料形成审计工作底稿时，除应注明资料来源外，还应实施必要的审计程序，形成相应的审计记录。
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影响混凝土拌合物和易性的主要因素有()。A.水泥强度等级B.砂率C.水灰比D.水泥浆量
影响混凝土拌合物和易性的主要因素有()。 A.水泥强度等级 B.砂率 C.水灰比 D.水泥浆量
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广东省东莞市一个家电制造公司近几年发展迅速，效益良好。为了使职工更大程度地参与企业管理和企业效益分配，增强职工的凝聚力和向心力，鼓励职工爱岗敬业，在企业长期工作，公司老板王总打算制定年金计划，但是对于年金不是很了解，所以就相关问题咨询了理财规划师。考虑到未来年金计划的支付问题，王总想知道如何确定企业年金的领取年龄比较合适。实际上，我国企业年金的领取年龄（）。
A.定在50岁 B.定在45岁 C.参照国家统一规定的法定退休年龄 D.企业自主决定
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