相关试题
【单选题】
锅炉燃烧调节中的风量调节一般选用___．
A. 均匀调节系统；
B. 比值调节系统；
C. 前馈调节系统；
D. 三冲量调节系统
【单选题】
在研究动态特性时可以将___看作系统对象环节的输入量．
A. 干扰作用；
B. 控制起作用；
C. 干扰作用和控制作用；
D. 测量仪表辖信号
【单选题】
正确选择压缩机防喘振调节阀作用形式是___．
A. 阀前式；
B. 气开式；
C. 气关式；
D. 阀后式
【单选题】
我国生产的单、双座调节阀，R值一般为___．
【单选题】
___是采用扫描方式工作的．
A. 可编程序控制器；
B. 工控机；
C. 普通PC机；
D. 单片机
【单选题】
对于西门子PLC，FB表示的是___．
A. 功能块；
B. 组织块；
C. 功能调用；
D. 数据块
【单选题】
油压千斤顶在使用的过程中只允许使用的方向是___。
A. 水平；
B. 垂直；
C. 倾斜；
D. 任意方向
【单选题】
特殊工序是指___
A. 需要有特殊技巧或工艺的工序；
B. 有特殊质量要求的工序；
C. 加工质量不能通过其后产品验证和试验确定的工序；
D. 关键工序
【单选题】
用压力法测量开口容器液位时，液位的高低取决于___。
A. 取压点位置和容器横截面；
B. 取压点位置和介质密度，
C. 介质密度和横截面，
【单选题】
调节阀在实际运行时阀位应当在___为适宜。
A. 30%～80%；
B. 15%～90%；
C. 20%～100%
【单选题】
有一气动阀门定位器表现为有输入信号无输出压力，你认为造成的主要原因有___
A. 阀内件卡涩等故障；
B. 放大器故障；
C. 喷嘴挡板污垢
【单选题】
控制高粘度、带纤维、细颗粒的流体，选用___最为合适。
A. 蝶阀；
B. 套筒阀；
C. 直通双座阀；
D. 偏心旋转阀
【单选题】
ST3000系列智能变送器的传感器是___。
【单选题】
双法兰变送器的响应时间比普通变送器要长，为了缩短法兰变送器的传送时间，变送器的环境温度___
【单选题】
有一法兰规格为ANSI 150 LB 3″，它的实际使用压力为___
A. 150LB；
B. 大于150LB；
C. 可能大于也可能小于150LB
【单选题】
被分析的气体内含有固体或液体杂质时，取源部件的轴线与水平线之间的仰角应大于___度。
【单选题】
串级调节系统的方块图中有两个调节器、两个变送器、两个被测对象和___
A. 三个给定值；
B. 四个给定值；
C. 两个给定值
【单选题】
质量管理是一个组织___工作的一个重要组成部分。
A. 职能管理；
B. 专业管理；
C. 全面管理；
D. 经济管理
【单选题】
单位时间内流过某一截面处的介质___，称为体积流量。
【单选题】
差压式流量计由以下___三部分组成。
A. 节流装置、连接管路、测量仪表
B. 孔板、阀门、流量计
C. 喷嘴、连接电缆、流量计。
【单选题】
XCZ—101型温度指示仪的外接电阻值注明在仪表刻度板上，一般为___1欧。
【单选题】
兆欧表使用中需根据被测对象不同来选择不同的___等级。
【单选题】
转子流量计中转子上下的压差由___决定
A. 流体的流速；
B. 液体的压力；
C. 转子的重量。
【单选题】
转子流量计中的流体流动方向是___
A. 自上而下；
B. 自下而上；
C. 自上而下或自下而上都可以
【单选题】
继电器是一种能借助于___或其他物理量的变化而自动切换的电器。
【单选题】
U型管压力计的零点在标尺中央，管内充水或水银，测压时，U型管一端接被测压力，另一端通大气，则两管有压差产生，那么___为被测压力值。
A. 上升侧至零点的液柱高
B. 下降侧至零点的液柱高
C. 两管至零点液柱的总和
【单选题】
双波纹管差压计是基于___原理而工作的。
【单选题】
YTK系列压力控制器系借助弹性元件的作用以驱使___工作的压力控制仪表。
【单选题】
切换阀是测量微压或负压的辅助设备，常与膜盒式压力表配合使用，以实现___脉冲管轮换接通的目的。
A. 一个微压计与一根
B. 两根微压计与多根
C. 一个微压计与多根。
【单选题】
气体测量管路从取压装置引出时，应先向上600mm，使受降温影响而析出的水分和尘粒能够向下___以免流入测量管路而造成堵塞。
【单选题】
程序控制属于断续控制，适用于接事先安排好的 ___，分段实行逐次控制的场所。
【单选题】
下列不正确的说法是___。
A. 调节器是控制系统的核心部件；
B. 调节器是根据设定值和测量值的偏差进行PID运算的；
C. 调节器设有自动和手动控制功能；
D. 数字调节器可以接收4一20mA电流输入信号
【单选题】
一般认为，经过___时间后，动态过程便结束了．
A. 3T；
B. T ；
C. 5T；
D. 10T
【单选题】
对调节系统最不利的干扰作用是___．
A. 阶跃干扰；
B. 尖脉冲干扰；
C. 宽脉冲干扰；
D. 随机干扰
【单选题】
___存在纯滞后，但不会影响调节品质．
A. 调节通道；
B. 测量元件；
C. 变送器；
D. 干扰通道
【单选题】
分程调节系统中两阀信号范围分段由___实现．
A. 调节器；
B. 电气转换器；
C. 阀门定位器；
D. 变送器
【单选题】
招标人采用邀请招标方式的，应当向___以上具备承担招标项目能力，资信良好的特定法人或者其他组织发出投标邀请书。
【单选题】
招标人对已发出的招标文件进行必要澄清或者修改的，应当在招标文件要求提交投标文件截止时间___前，以书面形式通知所有招标文件收受人。
A. 至少十日
B. 至少十二日
C. 至少十五日
D. 至少二十日
推荐试题
【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.
【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.
