相关试题
【单选题】
一定量的气体在同等环境下，存储容器容积越大，其压力（ ）。(1.0分)
A. 越小
B. 越大
C. 不变
D. 两者无关
【单选题】
车辆在缓解状态，下列容器压力描述正确的是（ ）。(1.0分)
A. 列车管>制动管>工作风缸
B. 列车管>副风缸>工作风缸
C. 列车管>副风缸>制动缸
D. 列车管=副风缸=工作风缸
【单选题】
下列都属于客车用制动阀的是（ ）。(1.0分)
A. F8、104、GL型
B. F8、104、120型
C. 103、104、GK型
D. 104、GK、GL型
【单选题】
使用下列转向架的客车一般不采用双管供风的是（ ）。(1.0分)
A. 209HS
B. 209P
C. CW-2C
D. SW-160
【单选题】
下列压力计量单位换算正确的是（ ）。(1.0分)
A. 1MPa=103kPa
B. 1MPa=100kPa
C. 1MPa=10kPa
D. 1MPa=106kPa
【单选题】
104型分配阀紧急室紧急排风时间规定为（ ）。(1.0分)
A. 10秒
B. 12秒
C. 13秒
D. 15秒
【单选题】
下列制动配件不须进行正方向安装试验的是（ ）。(1.0分)
A. 止回阀
B. 缓解阀
C. 差压阀
D. 截断塞门
【单选题】
使电子防滑器具有自通断电作用的主要部件是（ ）。(1.0分)
A. 测速传感器
B. 压力开关
C. 测速齿轮
D. 排风阀
【单选题】
段级修程中，同制动缸两闸片厚度差不得超过（ ）。
A. 5mm
B. 10mm
C. 15mm
D. 20mm
【单选题】
下列车辆中装有空重车阀的是（ ）。(1.0分)
A. YW25K型
B. RW25K型
C. XL25K 型
D. KD25K型
【单选题】
分配阀缓解不良的可能原因是（ ）。(1.0分)
A. 均衡活塞杆排气口堵塞
B. 缓解弹簧折断
C. 主活塞漏泄
D. 工作风缸漏泄
【单选题】
各软管水压试验时，外径膨胀率须小于（ ）。(1.0分)
【单选题】
软卧硬卧客车的标记是（ ）。(1.0分)
A. RYZ
B. RYW
C. RWZ
D. RZYW
【单选题】
GL3型三通阀在紧急制动时，制动管内的局部压力空气将排至（ ）。(1.0分)
A. 制动缸
B. 大气
C. 副风缸
D. 附加风缸
【单选题】
国产空调双层客车装有盘形制动单元，其重车名义制动率为（ ）。(1.0分)
A. 27 %
B. 30.6 %
C. 38 %
D. 40.5 %
【单选题】
盘形制动机的制动盘一般采用（ ）材料制造。(1.0分)
A. 合金铸铝
B. 合金铸铁
C. 可锻铸铁
D. 铸铜
【单选题】
25T型客车采用（ ）装置。(1.0分)
A. 104空气制动
B. F8空气制动
C. 104或F8电空制动
D. 104集成电空制动
【单选题】
双闸瓦式基础制动装置仅适用于构造速度（ ）以下的客车上。(1.0分)
A. 80km/h
B. 100km/h
C. 120km/h
D. 140km/h
【单选题】
CCB-Ⅱ型制动机单阀具有阶段制动和（ ）性能(1.0分)
A. 部分缓解
B. 一次缓解
C. 直接缓解
D. 阶段缓解
【单选题】
DK-1型制动机ZDF电动放风阀是受（ ）控制(1.0分)
A. 紧急电空阀
B. 中继阀
C. 分配阀
D. 列车管压力变化
【单选题】
QTY调压阀是用来向（ ）和作用管提供恒定压力的一种气动阀。(1.0分)
A. 列车管
B. 均衡风缸
C. 作用风缸
D. 控制风缸
【单选题】
常用制动通常占列车制动能力的（ ）。(1.0分)
A. 5%-20%
B. 10%-50%
C. 20%-50%
D. 20%-80%
【单选题】
DK-1型制动机紧急制动时，制动缸的最高压力可达（ ）kPa
A. 350
B. 400
C. 450
D. 480
【单选题】
有关检修规程规定：段修时，客车制动梁端轴磨耗超过（ ) mm时，应进行焊修。
【单选题】
DK-1型制动机设有两个压力开关其代号为（ ）。(1.0分)
A. 208、209
B. 205、207
C. 210、203
D. 201、222
【单选题】
109型机车分配阀具有充气缓解位、常用制动位、（ ）和紧急制动位四个作用位(1.0分)
A. 初制动位
B. 中立位
C. 制动位
D. 保压位
【单选题】
DK-1型电空制动控制器手柄在紧急位时，列车管的压力由500kPa降到0的时间为（ ）S以内。
【单选题】
制动缸漏泄降压时，104分配阀自动为其补充的风源来自（ ）。
A. 列车管
B. 工作风缸
C. 总风缸
D. 副风缸
【单选题】
CCB-Ⅱ型制动机包括（ ）个主要部件。
【单选题】
有关检修规程规定：段修时，客车基础制动装置的拉杆断裂，焊接后须进行（ ）拉力试验。(1.0分)
A. 600N
B. 1OOON
C. 1200N
D. 1600N
【单选题】
DK-1型空气制动阀在“电空位”时，其转换柱塞将（ ）。(1.0分)
A. 所用通路切断
B. 作用管与作用柱塞处沟通
C. 作用管与均衡风缸沟通
D. 作用管与调压阀管沟通
【单选题】
( )实际要素的形状所允许的变动全量称形状公差。(1.0分)
【单选题】
DK-1型制动机系统设有（ ）个转换阀。
【单选题】
DK-1型空气制动阀由全制位回运转位，制动缸压力由300kPa降至40KPA的时间不大于（ ）S。
【单选题】
车辆空气制动装置的控制机构是（ ）。(1.0分)
A. 三通阀或分配阀
B. 副风缸和制动缸
C. 制动缸及其活塞杆
D. 制动缸、制动活塞杆及缓解阀
【单选题】
CCB-II型制动机BDTV中13#管压力高于（ ）时，将导致16TV排风，自动制动作用缓解。(1.0分)
A. 100kPa
B. 140kPa
C. 200kPa
D. 240kPa
【单选题】
检修后109型分配阀须经试验（ ）合格后，方可装车使用。(1.0分)
A. 全电空数显锁定式制动机试验台
B. 701试验台
C. 705试验台
D. 单机试验台
【单选题】
CCB-II型制动机中自阀全制位，列车管压力（ ） 降至定压(1.0分)
A. 2～3
B. 2～5
C. 5～7
D. 7～8
【单选题】
货车编织制动软管总成的使用寿命为（ ）。
A. 1年
B. 1.5年
C. 3年
D. 6年
【单选题】
不摘钩翻卸作业的敞车软管应外带（ ）。(1.0分)
推荐试题
【单选题】
8)The breakdown of large molecules to smaller ones is called___
A. respiration
B. anabolism
C. catabolism
D. absorption
【单选题】
9) Which of the following descriptions about the characteristics of nervous regulation is wrong?___
A. It responds fast
B. It acts exactly
C. It responds slowly.D.
D. uration is short
【单选题】
10)Which of the following descriptions about the control of body function is wrong?___
A. Homeostasis is kept by feedback control.
B. Negative feedback minimizes the changes, leading to stability.
C. Positive feedback is not useful.
D. Feed-forward makes human body foresee and adapt itself to the environment promptly.
【单选题】
(1)Which of the following parts of knowledge of drugs should be included in pharmacology?___
A. The effects of drugs on man
B. The correlation of biological activity with chemical structure
C. The history, source, physical and chemical properties, compounding, biochemical and physiologicaleffects, mechanisms of action, absorption, distrilbution, biotransformation and excretion.
D. The prevention, recognition, and treatment of drug poisonings
【单选题】
(2)Which of the following is what a clinician is primarily interested in according to the text?___
A. Drugs which can be reasonably limited to those aspects that provide the basis for their rational clinical use
B. Chemical agents that are not used in therapy but are commonly responsible for household and industrial poisoning as well as environmental pollution
C. Drugs which are useful in the prevention,diagnosis and treatment of human disease,or in the prevention of pregnancy.
D. rugs which are useful in the prevention, diagnosis and treatment of human disease, or in the prevention of pregnancy.
【单选题】
(3)Why was the physician not interested in pharmacognosy?___
A. He didn't have to select the proper plants for his prescription
B. He had a broad botanical knowledge
C. Fewer drugs were obtained from natural sources
D. Natural drugs had little difference with synthetic ones
【单选题】
(4)Which of the following is the best way of studying pharmacology for medical students and practitioners?___
A. to have a broad botanical knowledge
B. to select a plant and its preparation
C. to have the ability to purify natural plants
D. to have curiosity that stimulates them to learn about sources of drugs
【单选题】
(5)What are the tasks related to medicines almost complete!y delegated to the pharmacists now?___
A. the physical and chemical properties of medicines
B. the preparing, compounding, and dispensing of medicines
C. dosage forms of medicines available
D. the therapeutic and other uses of medicines
【单选题】
(6) What is a main unique aspect of pharmacodynamics?___
A. Pharmacodynamics is an experimental medical science
B. Pharmacodynamics is focused on the characteristics of drugs
C. Pharmacodynamics borrows freely from both the subject matter and the experimenta techniques of physiology, biochemistry, microbiology, genetics and pathology
D. Pharmacodynamics correlates the entire field of preclinical medicine
【单选题】
7) What time of history does pharmacodynamics date back to?___
A. the second half of the seventeenth century
B. the second half of the eighteenth century
C. the second half of the nineteenth century
D. the second half of the twentieth century
【单选题】
8)What does the research on pharmacodynamics focus on?___
A. study of clinical effect of drugs
B. study of the process of drugs in the body
C. study of the effect and the mechanism of drugs on the body
D. study of the correlation of the actions and effects of drugs with their chemical structure
【单选题】
(9)Which of the following is true when drugs are selected?___
A. It has to be based in part on legal reasons.
B. It has to be based in part on ethical reasons.
C. It has to be based in part on the pharmacological evaluation in man
D. It has to be based in part on the pharmacological evaluation in animals
【单选题】
(10)Why are chemotherapeutic agents useful in therapy?___
A. They stimulate or depress biochemical or physiological function in man in a sufficiently reproducible manner to provide relief of symptoms or, ideally, to alter favorably the course of disease
B. They can produce desired effects with only tolerable undesired effects
C. They have only minimal effects on man but can destroy or eliminate parasites
D. The selectivity of their effects is one of their most important characteristics
【单选题】
1)H. Mario Geysen initially used parallel synthesis as a quick way to identify which small_____ of any given large protein bound to an antibody.___
A. division
B. pieces
C. part
D. fragment
【单选题】
2)Chemists often start a combinatorial synthesis by attaching the first set of building blocks_____ to microscopic beads made of polystyrene.___
A. solid
B. inert
C. soft
D. active
【单选题】
3）The chemical reactions required to link compounds to the beads and later to detach them____ to the synthesis proces.___
A. induce complications
B. make easy
C. introduce complications
D. introduce easy
【单选题】
4)In a parallel synthesis, all the products are_____ separately in their own reaction vessels.___
A. combined
B. assembled
C. joined
D. assorted
【单选题】
(5)In many laboratories today, robots assist with the routine work of parallel synthesis, such as small___ amounts of reactive molecules into the appropriate wells.___
A. sending
B. transporting
C. delivering
D. giving
【单选题】
(6)Scientists can pull out from the mixture the beads that bear biologically active molecules and then,using sensitive detection techniques,___ the molecular makeup of the compound attached.___
A. determine
B. make sure
C. find
D. search
【单选题】
(7)Most pharmaceutical companies today continue to___ parallel synthesis. Which of the following is not appropriate to be filled in the blank?___
A. count in
B. count on
C. depend on
D. rely on
【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.
