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财会类题库 1149

1 什么是测量值的绝对误差、相对误差、引用误差?

2 什么是测量误差?测量误差有几种表示方法?它们通常引用在什么场合?

3 什么是系统误差?系统误差可分哪几类?系统误差有哪些检验方法?如何减少和消除系统误差?

4 什么是直接测量、间接测量、和组合测量?

1 什么叫传感器?它由哪几部分组成?它们作用及相互关系如何?

2 什么是传感器的静态特性?它有哪几种分析方法?它们有哪些性能指标?

3 某压力传感器测试数据见电子版教材p37页2-4题表,计算非线性误差、迟滞和重复误差。

1 详见课本p58思考题和习题3-1

2 详见课本p58思考题和习题3-2

3 详见课本p58思考题和习题3-3

4 详见课本p58思考题和习题3-5

2 详见课本p82思考题和习题4--10

下列表述错误的是?

按照质子酸碱理论,下列化合物是质子碱的是?

按照lewis酸碱理论,下列化合物是lewis酸的是?

下列表述正确的是?

下列化合物酸性最强的是?

该化合物命名为2,2,5-三甲基-3-乙基己烷

该化合物命名为2,3-二乙基丁烷

该化合物命名为1,1,2-三甲基丁烷

下列烯烃与hbr加成的活性最大的是?

实验室中常用br2的ccl4溶液鉴定烯键,其反应历程是

(ch3)2c=ch2 与 hcl的产物主要是?

ch3ch=chch2ch=chcf3 br2 (1 mol) 主要产物为

某烯烃经臭氧化和还原水解后只得 ch3coch3,该烯烃为?

异戊二烯经臭氧化,在锌存在下水解,可得到哪一种产物?

下列哪种化合物能与氯化亚铜氨溶液作用产生红色沉淀

下列能使紫红色kmno4褪色也能遇银氨溶液沉淀的是

下列化合物酸性最强的是

在下列化合物中,最容易进行亲电加成反应的是

下列化合物中,与丁烯二酸酐发生diels-alder反应最活泼的是

下列化合物中哪一个能与顺丁烯二酸酐反应,生成固体产物?

丁二烯与溴化氢进行加成反应构成什么中间体?

3-己炔经下面那个条件可以还原为順式3-己烯?

丙炔与水加成反应的主产物是?

下列化合物不具有共轭结构的是

下列化合物中有手性碳原子的是

化合物的构型是

一对化合物的相互关系是

下列化合物中具有芳香性的是:

下列碳正离子最稳定的是?

下列化合物进行亲电取代反应速率最快的是?

下面哪个化合物在硝化时主要得到间位产物?

由苯合成对氯间硝基苯磺酸可由三步反应完成,你看三步反应以哪个顺序较好?

甲苯卤代得苄基氯应属于什么反应?

混酸硝化速度最快的是

硝化反应的主要产物是

用酸性重铬酸钠氧化不能生成苯甲酸的是

下列化合物进行sn2反应时,哪个反应速率最快?

(ch3)3cbr与乙醇钠在乙醇溶液中反应主要产物是:

下列化合物进行sn1反应时,哪一个反应速率最快?

下列化合物进行e2反应,哪个活性最大?

下列实验现象属于sn1反应机理的是

正溴丁烷与下列化合物发生亲核取代反应最快的是

下列化合物与水发生亲核取代反应生成醇,最容易的是

下列卤代烃与nash发生双分子亲核取代反应,反应速率最快的是

下列化合物中与硝酸银反应不能生成沉淀的是:

下列化合物与2 %agno3乙醇溶液反应速度最快的是

下列醇与金属 na 作用,反应活性最大的为

在酸催化下,与苯甲酸发生酯化反应速度最快的是

下列化合物与卢卡斯试剂(hcl/zncl2)反应速度最快的是

下列化合物中酸性最强的是

用格氏试剂制备1-苯基-2-丙醇,最好采用哪种方案?

下列化合物中能发生碘仿反应的是:

主要产物是:

乙醛和过量甲醛在稀naoh作用下主要生成

在稀碱作用下,下列哪组反应不能进行羟醛缩合反应?

氢化铝锂和硼氢化钠都是常用的氢化金属络合物,当用它们还原醛或酮时,分子中的四个氢原子都能进行反应,这类反应的特点是:

clemmensen还原是用zn(hg)/hcl进行还原,其作用是使 :

黄鸣龙还原是指:

在下列化合物中,能被2,4-二硝基苯肼鉴别出的是:

下列化合物羰基的活性最高的是?

下列化合物中不能发生康尼扎罗反应的是:

哪种羧酸衍生物具有愉快的香味?

下列化合物中酸性最强者为?

当r为何基团时,的碱性水解相对速率最慢?

下列各酯水解速率最快的是:

为合成应采用乙酰乙酸乙酯和下列哪种试剂反应?

合成应采用丙二酸二乙酯二钠盐与下列哪种化合物作用?

claisen酯缩合的缩合剂是强碱 ,用以增长碳链.从反应活性中心看,它们是

是什么异构体?

下列碳负离子最稳定的是

合成格氏试剂一般在下列哪一溶剂中反应?

实验室中常用的溶液鉴定烯键,其反应历程是:

环氧乙烷 产物是

下列一对化合物是什么异构体?

下面反应的主要产物是:

下列化合物中进行硝化反应最快的是

在酸催化下,与苯甲酸发生酯化反应速度最快的是

下列醛、酮不能与饱和亚硫酸氢钠反应的是

下列化合物中碱性最强的是

(ch3)3cbr与乙醇钠在乙醇溶液中反应主要产物是:

酸催化下,下列有机酸与甲醇发生酯化反应最容易的是

下列化合物中进行卤反应最快的是

下列化合物与水发生亲核取代反应生成醇,最容易的是

下列化合物与硝酸银的氨溶液反应生成沉淀的是?

一个化合物虽然含有手性碳原子,但化合物自身可以与它的镜像叠合,这个化合物叫

下列化合物中酸性最强的是

下列化合物中那个是非极性分子

下列化合物中酸性最强的是

正溴丁烷与下列化合物发生亲核取代反应最快的是

下列醇与金属 na 作用,反应活性最大的为

按碱性水解反应速率最慢的是?

下列化合物中不能发生康尼扎罗反应的是:

下列羧酸衍生物水解速度最快的是

下列实验现象属于sn2反应机理的是

用酸性重铬酸钠氧化不能生成苯甲酸的是

下列化合物中具有芳香性的是

下列化合物中能与fecl3显色的是

(ch3)2c=ch2 与 hcl的产物主要是

光照下,烷烃卤代反应的机理是通过哪一种中间体进行的?

异戊二烯经臭氧化,在锌存在下水解,可得到哪一种产物?

合成乙酸乙酯时,为了提高收率,最好采取何种方法?

下列化合物中有手性碳原子的是

下列烯烃与hbr加成的活性最大的是

关于π键,下列说法不正确的是?

下列羰基化合物中与亚硫酸氢钠溶液加成,反应速度最快的是

下列环烷烃中加氢开环最容易的是

能使不饱和伯醇氧化成不饱和醛的氧化剂应是 :

完成下列反应需要的还原剂是

下列化合物有几种旋光异构体?

下列化合物中哪一个能与顺丁烯二酸酐反应,生成固体产物?

下列化合物中能发生碘仿反应的是

下列能使棕红色br2/ccl4褪色不能使紫红色kmno4褪色的是

下列化合物与卢卡斯试剂(hcl/zncl2)反应速度最快的是

某烯烃经臭氧化和还原水解后只得 ch3coch3,该烯烃为

ch3ch=chch2ch=chcf3 br2 (1 mol) 主要产物为

下列化合物中那个是有机物?

下列化合物中室温下与硝酸银反应生成沉淀的是

用mg将丙酮还原制备频哪醇时, 应选用哪个溶剂?

测试技术的发展趋势: 、 、 、 。

用近似的公式或近似值计算测量结果而引起的误差是 。

下列哪个参数可以反映测试系统的随机误差的大小?

信息与信号二者间的关系是 。

测量数据处理的表述方法有表格法、图示法和 法。

传感器技术、计算机技术与通信技术一起构成了现代信息的三大支柱。

测试是以确定被测物属性量值为目的的全部操作。

对多次测量的数据取算术平均值,就可以减小随机误差的影响。

在间接测量中,只要直接测量的相对误差小,间接测量的误差也就一定小。

用近似公式或近似值计算测量值所造成的误差一般属于系统误差。

测试技术的发展趋势: 、 、 、 。

下列哪个参数可以反映测试系统的随机误差的大小?

用近似的公式或近似值计算测量结果而引起的误差是 。

信息与信号二者间的关系是 。

测量数据处理的表述方法有表格法、图示法和 法。

传感器技术、计算机技术与通信技术一起构成了现代信息的三大支柱。

测试是以确定被测物属性量值为目的的全部操作。

对多次测量的数据取算术平均值,就可以减小随机误差的影响。

在间接测量中,只要直接测量的相对误差小,间接测量的误差也就一定小。

用近似公式或近似值计算测量值所造成的误差一般属于系统误差。

连续非周期信号的频谱是 。

时域信号持续时间压缩,则频域中的低频成分 。

任意函数和函数的卷积,就是 。

已知,为单位脉冲函数,则积分的函数值为 。

时域信号持续时间延长,则频域中的高频成分 。

两个周期比不等于有理数的周期信号之和是周期信号。

非周期变化的信号就是随机信号。

周期信号的谐波分量是依一定规律集中在一些离散的频率上;非周期信号则是依一定密度分布在0到∞的连续频带内。

周期信号的频谱是离散的,非周期信号的频谱也是离散的。

各态历经随机过程是平稳随机过程。

在一测试系统中,被测信号频率为1000hz,幅值为4v,另有两干扰信号分别为2000hz,8v和500hz,2v,则利用 提取有用信号。

信噪比越大则 。

测试系统,传递函数为,则测量信号的输出信号为 。

一阶测试系统的单位斜坡响应为下列的哪一个?

传感器的静态特性中,输出量的变化量与引起此变化的输人量的变化量之比称为 。

一个理想的测试装置,其输人和输出之间应具有很好的线性关系。

用二阶系统作测量装置时,为获得较宽的工作频率范围,系统的阻尼比应接近于0.707。

用二阶系统作测量装置时,影响幅值测量误差大小的参数有灵敏度。

系统的传递函数,分别为响应与激励的拉氏变换,表明将随的减小而增大。

频率不变性原理是指.线性测试系统的输出信号的频率总等于输人信号的频率。

电路中鉴频的作用是 。

电桥这种测量电路的作用是把传感器的参数变化变为 的输出。

在测试装置中,常用(5-10)khz的交流作为电桥电路的激励电压,当被测量为动态量时,该电桥的输出波形为 。

抗混滤波器的截止频率是其幅值特性值等于 时所对应的频率。

电容传感器如果采用调频测量电路,此时传感器电容是振荡器 的一部分。

相敏检波的特点是 。

在电桥测量电路中,由于电桥接法不同,输出的电压灵敏度也不同,差动半桥接法可以获得最大的输出。

交流电桥可测静态应变,也可测动态应变。

在调频过程中,为保证测量精度,对应于零信号的载波中心频率应远低于信号的最高频率成分。

幅值调制装置实质是一个乘法器。

当两信号的互相关函数在有峰值,表明其中一个信号和另一个信号时移时,相关程度 。

正弦信号的自相关函数,使原有的相位信息 。

设信号x(t)的自相关函数为脉冲函数,则其功率谱密度函数必为 。

平稳随机过程必须是 。

对连续信号进行采样时,保持信号的记录时间不变,采样频率越高,则

正弦信号的自相关函数,使原有的相位信息保持不变。

互相关函数的最大值一定在处。

自相关函数是实偶函数,互相关函数也是实偶函数。

相于函数的取值范围为(-1, 1)。

which of the following prefix means half?

which of the following prefix means difficult or painful?

which of the following suffix means record or picture?

which of the following suffix means excision?

which of the following means surgical repair of the esophagus?

which of the following means rupture of the liver?

which of the following means the layer above the dermis?

which of the following means inflammation of the kidney?

which of the following suffix means instrument for viewing the stomach?

which of the following means heart pain?

the chin is below the nose so the chin is __________to the nose

the knee is near to the body trunk compared with feet, so the knee is ___________ to feet.

the nose is in front of ears so the nose is _________to ears.

the skin is the covering of body while bone is buried inside so the skin is _______to bone

___________means “bottom or lower part of an organ.”

__________means “the body lying horizontally and facing downward.”

which of the following means fat cell_________

which of the following means study of tissue____________

which of the following means above stomach____________

what does postnasal mean?

which of the following means within the skin?

which of the following means skin disease?

which of the following means abnormal condition of excessive sweat?

which of the following means black tumor?

which of the following means softening of nails?

collagen fibers are the major components of the ____.

special cells, ____, in the epidermis produce the black pigment that gives color to the skin and protects against damage from the ultraviolet rays of the sun.

adipose tissue mainly exists in ______.

which of the following is not the accessory structure of the skin?

___ protrudes into the hair bulb and provides nutrients for the growing hair.

which of the following means inflammation of vertebrae?

which of the following means disease of tendon and muscle?

which of the following means surgical repair of bone?

which of the following means bone and cartilage tumor?

which of the following means incision into the joint?

which of the following is not the facial bone?

which of the following is not the bone in the axial skeleton?

which of the following is not in upper extremities.

pectoral girdle includes two bones clavicle and ___________

which bone is on the little finger side of the forearm?

which of the following valve guards the atrioventricular orifice between the right atrium and the right ventricle?

which of the heart chamber receives blood returning from the pulmonary veins?

which of the following statement is not true?

________ are allest blood vessels, which provide sites of exchange of substances between the blood and the body cells

which of the following is the innermost layer of the heart wall?

which of the following means heart muscle disease?

which of the following means hardening of the vessel?

which of the following means suturing of an artery?

which of the following means process of recording a vein?

which of the following means inflammation of a valve?

which of the following means nose inflammation?

1. which of the following means paralysis of the voice box?

which of the following means insufficient oxygen in the blood?

which of the following means abnormal condition of nose fungus?

which of the following means normal breathing?

____ in the nasal cavity can increase the air turbulence.

____ serve(s) as a food and air passageway.

____ is the location of the vocal cords.

____ covers the larynx and trachea during swallowing, which provides protection against food and liquid being inhaled into the lungs.

each bronchiole terminates in a all group of air sacs, called ___.

the roof of the mouth is known as the ________.

the crown of the tooth is covered by a layer of ____, the hardest substance in the body.

the ileum connects to the colon through a sphincter called the ____ valve.

which of the following teeth do not belong to cutting teeth?

when the bile leaves the liver through left and right hepatic duct, it enters ______.

which of the following means the study of the mouth?

which of the following means the inflammation of the tongue?

which of the following means suturing the lip?

which of the following means condition of common bile duct stone?

which of the following means abnormal appetite?

which of following means rapid bleeding from bladder?

which of following means excision of a kidney?

which of following means kidney disease?

which of following means x-ray record of the renal pelvis?

which of following means frequent nighttime urination?

renal _____is the place, where the renal artery carries the blood into the kidney and the renal vein carries the blood out of the kidney.

the renal ___ is the blood-filtering portion of the nephron.

the filtering unit of the nephron, which is composed of a tangled cluster of blood capillaries is _____.

which of the following is not the stage of urine formation?

the male urethra is not only the outlet for urine but also the passageway for ___.

which of following means excision of the uterus?

which of following means milk discharge?

which of following means surgical repair of breast?

which of following means no menstrual flow?

which of following means blood in fallopian tube?

which layer of the uterus contracts to expel the baby from the mother’s body?

___ of the uterus communicates with vagina and the cavity of the uterine body.

what structure in the uterine tubes has the function of providing site for the fertilization?

below the center of the breast there is a ring of pigmented skin, called ___.

___ can store milk during nursing.

which of the following means headache?

poliomyelitis possibly means?

the word radiculoneurocele possibly means?

which of the following means recording the ultrasonic echoes of the brain?

encephalosclerosis possibly means?

the ___ lobe of the cerebrum controls visual information.

the ___ lobe of the cerebrum receives and interprets nerve impulses from sensory receptors and interprets language.

which part of brain is located beneath the posterior part of the cerebrum and maintain the balance and equilibrium

____________receive information from another cell and tranit the message to the cell body

____________carry messages from sensory receptors to the cns, central nervous system

which of the following shows the study of female?

which of the following means yellow skin?

which of the following means abnormal condition of hair fungus?

which of the following means excision of wrinkles?

which of the following means abnormal condition of porous bones?

which of the following means tendon pain?

which of the following means difficult movement?

what is the general medical term for hardening of the arteries?

which of the following means inflammation of all the sinuses?

which of the following refers to the instrument to measure the breathing?

which of the following terms means toward the side with respect to the imaginary midline?

this oily substance, ____, lubricates the skin surface.

which of the following is not facial bone?

the basal layer also contains special cells called_______, which produce black pigment that gives color to the skin.

which of the following terms means lying horizontally with face upward?

which of the following valve guards the atrioventricular orifice between the left atrium and the left ventricle?

which of the following statement is not true?

which bone is located on the upper sides of cranium and roof of skull.

which of the following is commonly referred to as adam’s apple.

the name for muscle tissue found in the walls of hollow or tube-shaped organs is_____.

which of the following means difficult digestion?

which of the following terms means dilated ureter?

which of the following terms means rapid blood flow from uterus?

which of the following terms means excision of the testes?

which of the following terms means inflammation of the gray matter of spinal cord?

the ______ sphincter opens and closes to control the passage of food into the all intestine.

27. _____ is the final stage of urine production occurring when the special cells of the renal tubules secrete ammonia, uric acid, and other waste substances directly into the renal tubule.

the distal end of each uterine tube expands as it curves around the ovary, forming the _______, where fertilization usually occurs.

______ is the innermost membrane layer of meninges and is applied directly to the surface of the brain.

each nephron is composed of a filtering unit consisting of a tangled cluster of blood capillaries called a glomerulus and a surrounding thin-walled saclike structure called a glomerular or________.

the epithelial tissue can provide support and protection to the body.

the deepest layer in the dermis is called basal layer.

bat-shaped bone that forms part of the base of the skull, floor, and sides of eye orbit is sphenoid bone.

pulmonary valve is a semilunar valve.

arteries carry blood back to the heart.

uvula can help the production of speech.

an afferent arteriole carries blood into the glomerulus.

cervical mucus can block the spread of bacteria from the vagina into the uterus.

inside the mammary glands, there are lobules, which contain lactiferous ducts that produce milk.

parietal lobe of the cerebrum can control motor function, personality, and speech.

the________ is the white half-moon shaped part at the nail base.

the vertebral or spinal column can be ided into five sections: cervical vertebrae, thoracic vertebrae, __________ vertebrae, sacrum and coccyx.

the wall of the heart is composed of three distinct layers: an outer epicardium, a middle_________, and an inner endocardium.

the maximum pressure achieved during ventricular contraction is called the ________ pressure.

in lungs, each bronchiole terminates in a all group of air sacs, called _______.

the _____ of the all intestine extends from the pyloric sphincter to the jejunum.

saliva contains the digestive enzyme, _____, which begins the digestion of carbohydrates.

each renal pyramid opens into a _____ ,which is continuous with the renal pelvis.

the organ of the female reproductive system, _____, functions to receive, retain, and nourish a fertilized ovum.

nervous tissue consists of two basic types of cells: _____ and neuroglial cells.

指出右图是何标识:

辐射按能量大小不同可分为:( )

公众在自然环境中所接受的辐射照射中所占份额最大的类型是:( )

人类只要生活在地球上就无时无处不接受辐射。

宇宙射线辐射强弱与所处纬度有关。

你所知道的生活中的那些现象属于辐射?

具有相同质子数,但中子数不同的元素互称为( )

发生a衰变时,母核释放出一个( )原子,转变为子核。

半衰期长的放射性核素在单位时间内衰变的几率大。

放射性核素的半衰期,即该核素原子核数目衰变到原来的一半所需要的时间。

根据所学内容分析一下负β射线为什么要用低原子序数材料进行屏蔽?

以下哪些属于天然辐射?

以下哪些属于人工辐射?

以下辐射中波长最长的是

机场安检仪一般是采用下列哪种射线?

为什么说x射线和伽马射线本质上是相同的?

对于“无论是天然的还是人工的,辐射只会损伤人体健康”这句话你是如何理解的?

以下属于随机性效应是

生殖细胞接受过量x线照射后若发生突变导致胎儿畸形,这属于电离辐射生物学效应中的

针对公众,年剂量限值为( )msv

射线作用于生物体内的水分子,引起水分子的电离,继而引起生物大分子的损伤,属于电离辐射生物效应中的( )

下列哪些机体变化属于确定性效应:

人的外照射急性放射病可分为

有人说:电离辐射生物效应中的随机效应,无非就是有或者无,全凭个人运气——运气好的人接受再多剂量照射也不会引发癌症、染色体畸变;运气不好,剂量很少也会产生上述不良后果。从这点意义上来说,对于随机效应来讲,防护不防护都没有什么意义。 请同学们结合所学知识,分析一下上述观点是否正确。

医院ct室的防护门选用铅质材料,目的是为了屏蔽

在内照射情况下,α、β、γ放射性物质的危害程度依次为

外照射防护的基本原则有

辐射防护的三原则是

在控制区、放射性污染区域内戴口罩的目的是为了减少内照射发生的机率。

辐射防护最优化意味着要不惜一切代价使个人剂量尽可能低。

有人笑谈电离辐射两种照射方式:“外照射霸气外露、强烈;内照射内敛、潜在实力强”。请同学们结合内照射、外照射的特点,分别谈谈内照射、外照射防护要点。

指出图中所示是何标志

居里夫人发现了下列哪种放射性核素?

辐射按能量大小不同可分为

发生负β衰变时,母核释放出一个( )后转变为子核

具有相同质子数,不同中子数的元素互称为

放射性活度的单位是

吸收剂量的单位是

自然界唯一存在的放射性气体是

g射线可应用于以下哪些领域

以下哪些不属于医学上电离辐射应用

下列哪些变化属于确定性效应

下列属于随机效应的是

电离辐射作用方式包括

射线作用于生物体内的水分子,引起水分子的电离,继而引起生物大分子的损伤,称为

电离辐射的辐射量子能量为

以下哪些效应不属于电离辐射测量原理

非电离辐射测量是根据以下哪些效应

以下哪项不属于辐射防护的三原则

以下哪个措施不属于外照射防护的基本原则

医院ct室的防护门选用铅质材料,目的是为了屏蔽

屏蔽g 射线和x射线,首选

屏蔽β射线宜选用原子序数( )的屏蔽材料

下列哪项措施属于内照射的防护原则

在内照射情况下,哪种衰变形式危害程度更大?

我国的核应急实行( )应急组织体系

( )意味核事故后果已经扩撒至核电站以外的公众区域

核电站安全运行的屏障中最外层的是 ( )

世界核电生产能力最强的是( )

以下非电离辐射中,频率最高的是

在移动基站周围会产生何种辐射?

防护非电离辐射最重要的是:(e)

下列可能产生非电离辐射的是( )

手机辐射属于以下哪种辐射类型

以下哪种情景可有效降低手机辐射

下列哪些属于非电离辐射测量

下列哪些属于电离辐射测量

经过放射源辐照后的食品,与放射源一样会对人体产生电离辐射生物效应

放射性废物具有放射性、辐射危害性、可以释放出热能这三个共同特征

只要是已被被放射性核素污染的物质,一旦预计不再利用,都可以定义为放射性废物。

核与辐射突发事件是指各种原因所致的放射性物质的释放或射线的泄露,而造成或可能造成公众身心健康严重受影响或损害的突发事件

按照国际核事件分级制(ines)将核事件或事故分为5个等级,危险越大等级越高,1-2级称为事件,3-5级称为事故

我国将放射事故按人体受照射剂量或者放射源活度分为,一般事故、 严重事故、 重大事故和特大事故

参与核事故现场救援的志愿者,为节约时间、抢救生命,进驻事故现场之前无需个人防护

核电站反应堆中采用的放射性原料与原子弹采用的原料一样,都是高浓缩铀

核电是一种清洁、高效、经济的新能源。

我国手机辐射检测参照标准,即sar值低于1.6瓦/千克

关于手机辐射对人体的伤害作用已经得到流行病学和动物学实验的证实

手机处于飞行模式时,不会产生辐射,可在飞机上正常使用。

对于中低放射性核废料国际上通行的做法是在地面开挖深约10—20米的壕沟,然后建好各种防辐射工程屏障,将密封好的核废料罐放入其中并掩埋

福岛核泄漏事故与切尔诺贝利核事故均属于特大级核事件,所以处理措施相同,均采用了空投灭火、永久覆盖反应堆等措施
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