相关试题
【判断题】
并联运行的变压器，若接线组别不同，则会造成短路故障。
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继电保护在需要动作时不拒动 , 不需要动作的不误动是对继电保护基本要求。
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反映二极管的电流与电压的关系曲线叫二极管的伏安特性曲线 , 有正向特性曲线和反向特性曲线之分。
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若干电阻串联时，其中阻值越小的电阻 , 通过的电流也越小
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配电装置的长度超过 6m时，屏后应有两个通向本室或其他房间的出口 , 其距离不宜大于 20m。
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隔离开关只能用来将电气设备与带电体隔离。
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断路器手车、压互手车必须在“试验位置”时，才能插上和解除移动式手车断路器的二次插头。
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电气设备发生火灾时，严禁使用能导电的灭火剂进行带电灭火。
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变压器的气体继电器安装于油箱和油枕之间。
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变配电所中的中央预告信号有直流操作和交流操作两种。
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晶体管的电流分配关系是：发射极电流等于集电极电流和基极电流之和。
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电力电缆的结构相当于一个电容器，无功输出非常大。
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万用表测量电压时是通过改变并联附加电阻的阻值来改变测量不同电压的量程。
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变压器的分接开关往Ⅰ档方向调整时，可降低二次侧的电压。
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用户变电站或配电室进行并路倒闸时，不应自行停用进线保护。
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正常情况下，第一种操作票应在工作的当天交给值班员。
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普通阀型避雷器主要用于变电所电气设备的防雷保护。
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弹簧操作机构是利用弹簧瞬间释放的能量完成断路器的合闸的。
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操作中如发生疑问，可按正确的步骤进行操作，然后把操作票改正过来。
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保护接地、重复接地、工作接地、保护接零等，都是为了防止间接触电最基本的安全措施。
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变压器电源侧发生故障时，变压器的瓦斯保护装置应动作。
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配电装置中高压断路器的控制开关属于一次设备。
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自动重合闸动作时，需将自动重合闸手动复位，准备下次动作。
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定时限电流保护具有动作电流固定不变的特点。
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最大值是正弦交流电在变化过程中出现的最大瞬时值。
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所有类型二极管在电气图纸中的符号是一样。
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登杆前要对登高板的板子做冲击载荷试验 , 确认登高板的性能安全后才能使用。
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据统计数据显示，触电事故的发生有一定的规律性，其中在专业电工中 , 低压触电高于高压触电 , 农村触电事故高于城镇。
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共基极电路特点是输入阻抗较小， 输出阻抗较大 , 电流、电压和功率的放大倍数以及稳定性与频率特性较差。
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高压架空线路的导线与拉线、电杆、或构架间的净空距离不应小于 0.3m。
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静电电压可达到很高，有时可达数万伏，但静电能量较小 , 一般不会使人遭电击死亡 , 但其引发的火灾等二次事故则易使人死亡
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钳表在测量的状态下转换量程开关有可能会对测量者产生伤害。
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当梯子的高度大于 6m时，要上、中、下三端绑扎。
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配电网按其额定电压分为一次配网、二次配网。
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为确保安全，户外变电装置的围墙高度一般应不低于 3 米。
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直接与生产和输配电能有关的设备都是一次设备。
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箱式变电站箱体内的一次设备为全封闭高压开关柜，产品无裸露带电部分 , 为全封闭、全绝缘结构 , 完全能达到零触电事故。
推荐试题
【单选题】
(8)Once they identify a promising substance, they___ make many one-at-a-time modifications to the structure.___
A. laboriously
B. hardly
C. easy
D. effectively
【单选题】
(9)Often these procedures yield a compound having acceptable___ and safety.___
A. strength
B. effect
C. potency
D. effort
【单选题】
10)In many laboratories today, robots___ the routine work of parallel synthesis.___
A. help
B. assist with
C. assist in
D. assist to
【单选题】
(1)Pharmaceutics is an interdisciplinary subject involving___
A. formulation, manufacturing, physical pharmacy, and biopharmaceutics
B. manufacturing
C. physical pharmacy
D. biopharmaceutics
【单选题】
（2）Formulation is about the design, development and evaluation of dosage forms,___
A. discovery of novel drugs
B. analytical methods
C. drug delivery systems and manufacturing process
D. dosing regimen
【单选题】
(3)Biopharmaceutics mainly studies the in vivo process of drugs and metabolites in humans, animals and tissue culture, which specifically involves___
A. absorption and distribution
B. absorption, distribution, metabolism, and excretion
C. metabolism and excretion
D. absorption and excretion
【单选题】
(4)Regarding the definition of bioavailability(BA), BA is related to___
A. total plasma drug concentration only
B. unbound drug concentration in the plasma
C. unbound drug concentration at the target site
D. total plasma drug concentration, and the administered drug dose
【单选题】
(5)Plasma drug concentration is affected by following factors such as___
A. rate of absorption
B. rate and extent of distribution
C. rate ofeli Imination
D. all ofabove
【单选题】
6)Which of the following routes of administration will involve the absorption of drugs?___
A. i.v.injection
B. i.v.infusion
C. Subcutaneous injection, transdermal and oral
D. None of above
【单选题】
（7）Which of the following factors may influence the time course of a drug in the plasma and hence at its site of action?___
A. Food
B. Disease state
C. Route of administration
D. All of above
【单选题】
(8)Please identify the potential biological barriers for an orally administered tablet to be absorbed into the systemic circulation___
A. Sk d dermis
B. Gastrointestinal epithelium
C. Oral mucosal membrane
D. All of above
【单选题】
(9) Given the same administration dose, which of the following will likely result in varying bioavailabilities for the same drug administered to the same person? ___
A. tablets (p.o. )vs. solutions(p0.)
B. solutions for injection(i v )vs oral solutions(p0.)
C. coated tablets (p.0. )vs hard gelatin capsules(p0.)
D. All ofabove
【单选题】
(10)Which of the following statements is true?___
A. Bioavailability is only related to the administered dose and the total drug concentration in the blood circulation.
B. Plasma protein binding does not affect the bioavailability of a specific drug.
C. A given drug in different dosage forms may show differences in bioavailability if given by the same route.
D. Biopharmaceutical studies do not involve animal experiment.
【判断题】
Much of our present physiological knowledge has been found from the experiments and studies on human beings.
【判断题】
Living cells break down glucose and fats to provide energy for other activities, which is called.
【判断题】
The right atriapumps deoxygenated blood to the lungs where it absorbs oxygen from the air.
【判断题】
The nervous system uses electrical signals to transmit information very rapidly to specific cells.
【判断题】
With the level of sodium increasing extracelular fruid. the cardiac muscle cells become too excitable and may contract.
【判断题】
A negative feedback loop is a control system that acts to maintain the level of some variables within a given range following a disturbance
【判断题】
(1)Pharmacodynamics, which is concerned with the study of the biochemical and physiological effects of drugs and their mechanisms of action, Is an experimental medical science.
【判断题】
2)It's unreasonable for a physician to be interested mainly in the effects of drugs on human beings, for the pharmacological evaluation of drugs in them may be limited due to technical, legal, and ethical reasons.
【判断题】
（3） As the effects of drugs are often characterized by significant interspecies variation and may be further modified by disease, clinical pharmacology has never been efibrasized.
【判断题】
The physician is not interested in drugs that are useful in the prevention,diagnosis,and treatment of human disease, but in chemical agents that are commonly responsible for household and industrial poisoning as well as environmental pollution.
【判断题】
(5)A drug is said to be useful in therapy if it has the ability to produce its desired effects with only tolerable undesired effects.
【判断题】
(6)Toxicology deals not only with drugs used in therapy but also with many other chemicals that may be responsible for household, environmental, or industrial intoxication.
【判断题】
1)With the more efficient screening tests and burgeoning knowledge about how a molecules biological activities are likely to be changed, the traditional approach of discovering new drugs has been improved.
【判断题】
2)With the parallel synthesis used to identify which small segment of any given large protein would bind to an antibody, Mario Geysen generated a variety of short protein fragments by combining multiple amino acids in different permutations.
【判断题】
)A parallel synthesis and a split-and-mix synthesis are different in that in a split-and-mix synthesis, all the products are assembled separately n their respective reaction vessels.
【判断题】
4) In many laboratories, robots are used in the routine work of parallel synthesis to deliver small amounts of reactive molecules into appropriate wells, thus making the process more accurate and less tedious.
【判断题】
5) In a parallel synthesis, each compound remains in its own container; while in a split-and-min synthesis, the related ce mpounds are mixed up in the same reaction vessel.
【判断题】
6)In order to solve the difficulties of identifying the compounds made in a parallel synthesis scientists pull out from the mixture the beads that bear biologically active molecules and determine the molecular makeup o d attached.
【判断题】
1)The concentration of a drug in whole plasma is the most accurate index of the drug concentration at the site（s） of action.
【判断题】
(2)It is difficult to measure the total concentration of both unbound and bound drug in total plasma.
【判断题】
(3)The clinical effect of a drug is assumed to be directly related to the plasma drug concentration.
【判断题】
(4) Systemically acting drugs administered by all routes involve the absorption of drug from the place of administration into the blood.
【判断题】
5)Bioavailability of a drug indicates whether a therapeutically effective concentration is achieved at the site(s)of action of that drug.
【判断题】
(6)Prodrugs are not therapeutically effective unless they are changed into therapeutically active forms before or after reaching the systemic circulation
【单选题】
（1）地球表层覆盖着很多圈层，其中最厚的圈层是 ___
A. 岩石圈
B. 水圈
C. 大气圈
D. 生物圈
【单选题】
（2）目前受人类影响最强烈的地球圈层部位主要在大气圈底层、岩石圈上层以及 ___
A. 生物圈表层
B. 生物圈中层
C. 水圈底层
D. 水圈全部
【单选题】
（3）生物圈的范围为___
A. 大气圈、水圈和岩石圈的全部
B. 大气圈和水圈的全部、岩石圈的上部
C. 大气圈的底部、水圈和岩石圈的全部
D. 大气圈的底部、水圈的全部和岩石圈的上部
