统计学产生于( )。 a、 b、 c、英国 d、德国
统计学产生于( )世纪。 a、15 b、16 c、17 d、18
在没有对事物人为控制的条件下而得到的有关社会经济现象的统计数据属于()。 a、观测数据 b、实验数据 c、截面数据 d、时间序列数据
在实验中控制实验对象而收集到的数据叫做观测数据。
用来描述总体特征的概括性数字度量,称为参数。我们所关心的参数通常为总体平均数,方差,总体比例等。
描述统计的内容包括取得研究所需要的数据、用图表形式对数据进行加工处理和显示,进而通过综合、概括与分析,得出反映所研究现象的一般特性。
交叉分组列表属于数据整理方法中的()。 a、图示法 b、汇总法 c、数值法 d、表格法
下列图示法中只适用于数值型数据的是() a、直方图 b、环形图 c、条形图 d、饼图
在对数值型数据分组之后,每一组的下限与上限之间的中点值,称为()。 a、平均数 b、组中值 c、期望 d、平均水平
统计数据图示法包括()。(多选题) a、条形图 b、饼图 c、直方图 d、累计图
统计数据整理的程序包括()。(多选题) a、审核原始数据 b、分组和汇总 c、做出统计图 d、设计整理汇总方案
频数频率分布表不属于数据整理方法中的()。 a、表格法 b、图示法 c、汇总法 d、数值法
数据预处理中的数据审核就是检查数据中是否有错误。
条形图,饼图,环形图以及直方图都适用于显示顺序数据。
箱线图是由一组数据的最大值,最小值,平均数和两个四分位数绘制而成的,反映原始数据分布的图形。
下列对相关与独立关系描述正确的有()。 a、两个相互独立的随机变量一定不相关 b、不相关的两个随机变量一定相互独立 c、对正态分布来说,不相关不一定独立 d、对正态分布来说,独立不一定不相关
为了估计每分钟广告的平均费用,随机抽取16个电视台组成样本进行调查。调查结果样本的平均费用为2000元,标准差为1000元。假定所有被抽样的这类电视台的广告费用都近似服从正态分布,每分钟广告的平均费用的区间估计为()。(取置信水平为0.05) a、[1367,2533] b、[1467,2533] c、[1467,2933] d、[1367,2933]
因素的同一水平下样本数据的方差,叫做()。 a、随机误差 b、系统误差 c、组内方差 d、组间方差
下列描述正确的是( )。 a、组内方差只包含随机误差 b、组内方差既包括随机误差,又包括系统误差 c、组间方差只包含系统误差 d、组间方差既包括随机误差,又包括系统误差
方差分析的模型假设包括()。 a、每个水平为一个正态总体,即每个水平下的观察值都服从正态分布 b、各个总体的方差必须相同 c、同一水平下的观察值都相互独立 d、不同水平下的观测值都相互独立
下列对相关与独立关系描述不正确的有()。 a、两个相互独立的随机变量一定不相关 b、不相关的两个随机变量一定相互独立 c、对正态分布来说,不相关不一定独立 d、对正态分布来说,独立不一定不相关
方差分析是通过对各观察数据误差来源的分析来判断多个总体均值是否相等的统计分析方法。
最小显著差异法是一种判断均值之间是否存在差异的多重比较的方法。
方差分析是一种推断多个总体的方差是否相等而进行的假设检验。
2、在问卷调查中,()是在调查之前必须明确的。 a、调查目的 b、调查对象 c、调查项目 d、调查表
在问卷设计中,()指的是调查的具体内容。
通过《统计年鉴》获得数据,属于哪种统计方法。 a、统计报表 b、重点调查 c、查阅统计数据 d、典型调查
统计调查方法包括() (a)普查 (b)抽样调查 (c)重点调查 (d)典型调查
查阅统计资料中的资料包括( )。 a、《统计年鉴》 b、《世界发展报告》 c、个人银行账目 d、google
下列统计调查方法中,能用来推断总体特征的有()。 a、普查 b、抽样调查 c、重点调查 d、查阅统计资料
通过网络查阅资料也属于统计调查的方式之一。
查阅统计资料不是一种统计调查方法。
调查了某高校100名职工,文化程度分为文盲、小学、初中、高中、大专、大学以上等六类,可以用1,2,3,4,5、6分别代表这六类文化程度。这些数值的大小具有一定的数量意义。
参照视频流程制作分子链模型,并将透视图截图()上交
参照视频制作凉亭模型,上交截图
造型准确,构图合理。
根据视频制作冰淇淋模型
仪器分析法的主要不足是:
分析测量中系统误差和随机误差的综合量度称为:
分析方法的灵敏度和精密度的综合指标是:
不同人员在不同实验室测定结果的精密度称为:
依据分析任务的不同,分析化学方法有:
依据分析原理的不同,仪器分析方法有:
按光谱的性质和形状,光谱可分为
光谱分析与其它仪器分析法的不同点在于光谱分析法研究涉及的是
原子光谱是一条条彼此分立的线光谱,分子光谱是一定频率范围的电磁辐射组成的带状光谱。
分子光谱负载了分子能级信息,而分子能级包括转动能级和振动能级两种能级层次,这些能级都是量子化的。
与火焰原子化吸收法相比,石墨炉原子化吸收法:
通常空心阴极灯是:
原子吸收光谱法中物理干扰可用下列哪种方法消除?
用原子吸收光谱法测定钙时,加入1%钾盐溶液的作用是______。
在aas分析中,如果采用连续光源,即使有分辨能力足够高的光栅,也不能准确测得积分吸收值。
用峰值吸收代替测量积分吸收其主要条件是发射线与吸收线的中心频率一致,同时发射线的半宽度大大小于吸收线的半宽度。
原子发射光谱是由于_________ 而产生的。
原子发射光谱法利用标准光谱比较法定性时,通常采用_________作标准。
样品的气溶胶在等离子体的焰心区_________
在原子光谱仪器中,能够将光信号转变为电信号的装置是:
zn原子在火焰温度下激发跃迁到亚稳态,再吸收334.5 nm 的光进一步激发,激发态原子辐射出334.5nm 的光,此种原子的荧光称为:
在uv-vis中,下列不属于影响吸收峰位置的内部因素是 。
有人用一个样品,分别配制成四种不同浓度的溶液,分别测得的吸光度如下。测量误差较小的是:
分光光度计定量测定时,工作曲线弯曲的原因可能是:
紫外-可见分光光度法中,需要选择的吸光度测量条件为:
有色物质的最大吸收波长仅与溶液本身的性质有关。
紫外-可见吸收光谱是由于分子中价电子跃迁产生的。
有权进行司法解释的是
我国刑法对空间效力的规定,采取的是
犯罪客观要件中的选择要件包括
本课程的名称是刑法总论。
简答题:简述我国《刑法》对刑事责任年龄的规定。
论述题:试论我国刑法对共同犯罪中的犯罪人的分类及其各自刑事责任。
案例分析题: 通过本学期刑法总论课的学习,对你来说是否有收获?请具体说明理由。
()不属于物流的基本功能。
可以使用不同的权重来使决策过程更加客观的选址方法是()
以下哪种货架类型是所有储位可直接存取?
我国优先推荐使用的托盘尺码是()
影响选址的外部因素不包括()
驶入式和贯穿式货架比较适合于()的货物存放
()是用来衡量组织的流程、活动是否达到了最佳实践水平的系统管理工具。
()轻巧、易操作、回转半径小,适合于短距离搬运轻型物料。
面包店、牛奶厂常常选址在邻近供应商的地点,说明企业选址时应考虑()
以下满足fifo的货架类型有()
托盘按其结构可分为()
企业物流系统分析包括()
影响决策的内部因素包括()
以下哪种货架类型不是以托盘为存储单元的?()
以下方法属于成本分析法的有()
服务设施选址时应考虑的主要因素包括()
成本分析法是最实用和最具参考价值的方案评价方法。
集装箱具有使用方便,装卸效率高,减少包装材料消耗和运输管理费用等优点。
地方的政策法规对企业选址没什么影响。
德尔菲法常用于预测工作,不可用于选址分析时使用。
选址决定了整个物流系统既其他层次的结构,物流设施的规模和数量对选址工作有很大的影响。
在选用手推车时,首选应考虑货物的放置方式。
电子零件、精密机件量少、品种多,可置于旋转式货架。
各国的托盘尺码是统一标准化的。
对于制造企业而言,企业物流就是生产物流。
物流贯穿于企业生产全过程,很多时候物流系统就是生产系统。
标杆分析有助于确定是采用集中存储还是分散存储策略,以及对成本、服务、绩效和竞争力方面改进的评估。
一般物流量是用物体的重量衡量的。
企业销售部门从自己部门考虑,更多的考量有较高的物流服务,物流成本的控制应由物流部门来考量。
服务设施选址过程中主要考虑业务和收入的决定因素。
简述对不同选址方案进行论证和评价时应掌握的原则。
货架具有哪些功能?
什么是系统,系统具有哪些特点?
什么是重力式货架,其具有什么特点?
物流建筑的选址应符合哪些规定?
一个玩具制造商在全国5个地区生产玩具,原材料(主要是塑料粉桶)将从一个新中心仓库运出,而此仓库的地点还有待确定。运至各地的原材料数量相同,已建立一个坐标系统,各地的坐标位置如表所示,请确定仓库的坐标位置。 地点 a b c d e 坐标 (2,6) (3,5) (2,9) (6,3) (4,1)
the physiological importance of positive feedback control is
the mechani of the life could be disclosed intensively and clearly through the experiments at the level of
the capillary bed open as the metablites accumulate following the enhanced metablitic activity of local tissue. it is controlled by
which kind of molecules or ions could be transported across the membrane independent on the integral protein.
the correct description about homeostasis include:
the properties of the conditioned reflex include
which one below could act as humoral regulating factor in blood.
the properties of the humoral regulation include
the properties of the secondary active transport include
if the membrane potential is fixed from resting potential to -9 mv, which kind of membrane could be recorded
the depolarization phase of ap is attributed to
whether or not a stimulation could induce ap on the excitable membrane is determined by
the stimulation that could induce action potential should be
the voltage clamp could
the plaa membrane of neuron at resting state is permeable only to k .
the stimulation most used in physiological experiments is electrical stimulation.
the local current and local potential is the basis for the propagation of action potential on the membrane.
if ap was initiated at cell body on an afferent neuron, it will propagate to the axon ending.
thick filament is composed of
the properties of the signal tranission at nmj include
myosin head could bind with
thin filament is composed of
the voltage gated calcium channel is situated at the postsynatic membrane of nmj (end plate).
curarine is the agonist of ach receptor at the end plate of skeletal muscle.
both organophosphorus pesticide and sarin inhibit the ache (acetylcholinesterase)
the transverse tubule of the sarcolemma is belong to the intracellular membrane system.
which of the following contains blood with a relatively high oxygen content?
during isovolumetric contraction of the ventricles:
during the cardiac cycle,
when do the a-v valves close during the cardiac cycle?
which of the following events occurs at the end of the period of ventricular ejection?
cardiac output
which of the following events is associated with the first heart sound?
which part provides the greatest resistance to blood flow?
which of the following does not contribute to increased stroke volume during exercise?
the increase in heart rate caused by seeing a wild dog run after you is probably the result of the _____.
sympathetic stimulation of the heart normally causes which of the following conditions?
filariasis(丝虫病) causes edema by
which factor does not influence the venous return?
the arterial blood pressure:
which of the following is wrong about the gastrointestinal hormones?
which is not a gi hormone?
which one can inhibit the secretion of gastric juice?
the gastric receptive relaxation is through:
the functions of gastrin do not include:
which of the following descriptions about the gastric acid is wrong?
the substance that can stimulate gastric secreting is:
which can increase the digestion of protein?
factors that could not promote gastric emptying are:
which is true regarding the bile ?
pulmonary ventilation is
pulmonary gas exchange is the process of
internal respiration is
the driving force for the pulmonary gas change is
which one is correct about the pleural pressure
during quiet breathing, the pleural pressure
which one is correct about the physiological importance of alveolar surfactant?
the correct descriptions about respiration include
which one is correct about pulmonary pressure
the correct descriptions about alveolar surfactant include
which of the following events would not be expected to decrease glomerular filtration rate?
renin causes
a baby will suffer neonatal hemolytic anemia if the blood of
the red blood cells of a patient coagulate if it is incubated in the serum of type b blood, but the red blood cells from type b blood does not coagulate if it is incubated in the serum of this patient. the blood type of this patient is
which description is correct about thrombin?
the anticoagulants effect of sodium citrate is attributed to
the reasons why the blood does not coagulated in healthy vessels include
the process of hemostasis following the rupture of blood vessels include
the effects of platelet in the hemostasis include
the chemicals that could prevent blood coagulation include
the anticoagulant system in the blood is consist of
which description is correct about chemical synapse
which one is correct about the ap conduction velocity of nerve fiber
which part of the nervous reflex is fatigable.
which property could be destroyed by the local anesthetics procaine (普鲁卡因).
which of the following is not the chemical mediated signal tranission.
both afferent collateral inhibition and recurrent inhibition are
which ion is coupled with the release of neurotranitter?
the factors that influence the ap conduction velocity on nerve fiber include
which one is the phasic receptor?
which one is the result of the increase of the suspensory ligment tension.
cones is mainly located at
which of the following is the function of the ossicles in the middle ear?
if the pupil enlarge, the spherical aberration will , the colour aberration will .
in emmertropia, without accommodation, the principle focus behind the lens is located at a point
the correct description about the properties of receptor potential include
the refractive system of the eyes include
which description is correct about the α motor neuron in anterior horn of the spinal cord.
which description is right about the gama motor neuron in the anterior horn of the spinal cord
which description is correct about muscle tone.
excitation of γ motor neuron will induce
which description is correct about the deep tendon organ?
parkinson's disease is caused by destroying
chorea is caused by destroying
the evoked cortical potential is
theαwave is always recorded at in .
which description about α wave in eeg is right?
the brain electrical waves is the result of
which one is the special characteristic of physiological activities during rems.
the physiological importance of rems is
the predominant type of wave of eeg during silent, awake, and eye closure in is
the characteristics of sws is
the circadian is controlled by
rems is helpful for
which of the following hormone is amine?
which of the following description about hormone signal transduction is correct?
which of the following description is correct upon receptor upregulation?
the most important hormone that affects human nervous system growth is
which of the following thyroid hormone and related precursor has the most biological activity?
hormone transportation and delivery includes
which of the following regluates hypothalamic hormone secretion?
which of the following description about insulin-like growth factor(igf) is correct?
which of the following promotes growth hormone secretion?
which one is not the excitable cell?
simple diffusion and facilitated diffusion share which of the following characteristics?
which of the following statements about homeostasis is true ?
which of the following is a consequence of myelination in large nerve fibers?
excitation–contraction coupling in skeletal muscle involves all of the following events except one. which one is this exception?
which process is not involved in the hemostasis?
intrinsic pathway does not need factor
the second heart sound is heard
during the cardiac cycle of a normal healthy young :
the stroke volume is mainly regulated by
concerning the nervous regulation of the circulation:
which process of the following will not cause edema?
cells in the purkinje network are
the basic electrical rhythm of the gastrointestinal tract is originated from
which one is not a vasodilator?
which of the following statements about the enteric nervous system is true?
________ is where the majority of digestion takes place.
which of the following factors inhibits the gastric empting?
during sports, which organ is mainly responsible for heat production?
during inspiration,
which of the following is filtered most readily by the glomerular capillaries?
regarding chemical neurotranission, which of the following is appropriate?
which of the following description is not the properties of the receptor potentials?
the characters of referred pain is
when the eye accommodates for near vision, which one of the following is correct?
why does the cone system have high visual acuity?
which of the following description about cochlea is incorrect?
which of the following activities will increase the sensitivity of the stretch reflex?
neurological disease associated with the cerebellum produces which of the following types of symptoms?
which one of the following is not correct statements regarding fast wave sleep?
which of the following control of endocrine action is a positive feedback?
which of the following hormone secrets from adrenal cortex ?
the cause of the acromegaly is
which of the following description about islet hormones is correct?
which of the following description about cretini and dwarfi is incorrect?
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